greatest witch hunt in american political history, led by some very bad and conflicted people." jeff pegues is following this. >> reporter: the president's tweets came after the "washington post" reported that he is now the subject of an obstruction of justice investigation. his response, "they made up a phony collusion with the russians story, found zero proof, so now they go for obstruction of justice on the phony story. nice." cbs news has learned that special counsel robert mueller will interview director of national intelligence dan coats and nsa director admiral mike rogers amid reports about whether the president pressured

them to tamp down the investigation into allegations of collusion between the trump campaign and russia. >> do you solemnly swear to tell the truth? >> reporter: a week ago former fbi director james comey told senators that he believed he was fired by mr. trump because of the fbi's ongoing russia investigation, which comey was leading at the time. >> do you believe this will rise to obstruction of justice? >> i don't know. that's bob mueller's job, to sort that out. >> reporter: ron hosko, a former assistant director of the fbi, says while obstruction of justice is hard to prove the allegation itself could hurt the president. don't you have to prove intent? >> getting to intent to obstruct or impede is going to be very important. and it could be that they never are able to build that case in a meaningful way. however, damage could be done, political damage could be done during the process. >> reporter: mueller's appointment a month ago to oversee the investigation drew bipartisan praise.

the white house even interviewed him to fill the vacant fbi director job on may 16th. but as mueller's investigation gained traction, the president's allies began accusing him of trying to undermine the trump presidency. and the president himself has chimed in, tweeting this afternoon, "why is it that hillary clinton's family and dems dealings with russia are not looked at but my non-dealings are?" a former fbi official says the president's tweets could be used by the special counsel as evidence. scott, late today cbs news confirmed that vice president pence has hired a personal lawyer to answer any questions investigators may have for him. >> jeff pegues in our washington newsroom. jeff, thank you. after four days of deliberations jurors in bill cosby's sexual assault trial told the judge today they are deadlocked. he told them "keep trying." jericka duncan is at the courthouse in norristown,

pennsylvania. >> reporter: bill cosby remains in a small room inside the courthouse. early this afternoon jurors told the judge they could not reach a unanimous verdict on any of the three counts against cosby. cosby's attorney, brian mcmonagle asked the court for a mistrial but that request was denied. instead the judge told the sequestered jurors to keep deliberating. cosby's publicist, andrew wyatt. >> and this deadlock shows the not guilty that mr. cosby has been saying the entire time. >> reporter: the jury has paused deliberations to review evidence a half dozen times. the 79-year-old comedian has been accused by nearly 60 women of sexual assault over the past several decades. but cosby has denied those accusations. andrea constand's case was the only one that was still eligible to go to trial. lili bernard says she too was sexually abused by cosby. she got into a heated argument with cosby supporters after the

jury announced they were deadlocked. >> he preyed upon my vulnerabilities and he drugged me and raped me against my will. >> reporter: cosby has been charged with sexually assaulting andrea constand at his pennsylvania home in 2004. constand testified that cosby drugged and molested her after giving her three blue pills which she says left her paralyzed and unable to move. cosby says it was consensual. former prosecutor dennis mcandrews. >> if the jury comes back and names that they're deadlocked, then the judge can declare a hung jury and declare a mistrial, which allows a new trial for the defendant. >> reporter: if the judge declares a mistrial, it will ultimately be up to andrea constand whether she wants to go through this process again and testify at another trial. scott, today constand posted a video on twitter of herself playing basketball with the words "always follow through," implying she is not ready to quit. >> jericka duncan, thanks. coming up, a father says

north korea brutalized his son. and later, the death toll rises in a horrific fire.

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the american college student released from prison tuesday by north korea has extensive brain damage, and it appears the north koreans have lied about how it happened. michele miller is following this. >> reporter: fred warmbier walked into the press conference wearing the same jacket his son wore during his trial last march. >> i'm so proud of otto, who has been in a pairia regime for the last 18 months, brutalized and terrorized, and he's now home with his family. >> reporter: the comatose 22-year-old college student was flown back to the united states last tuesday. fred warmbier described greeting his son for the first time in nearly two years. >> i knelt down by his side, and i hugged him.

and i told him i missed him and i was so glad that he made it home. >> reporter: north korean officials claim otto fell into a coma after he contracted botulism and took a sleeping pill a day after he was sentenced to 15 years of hard labor. he was convicted for committing a hostile act after allegedly stealing a propaganda poster during a college group tourist trip last year. today doctors at the university of cincinnati medical center said he shows no sign of a botulism infection but he did suffer severe brain damage. lead physician daniel kanter. >> he has spontaneous eye opening and blinking. however, he shows no signs of understanding language. >> reporter: kanter says the brain injury was likely caused by a sudden stopping of the heart. >> this pattern of brain injury, however, is usually seen as a result of cardiopulmonary arrest

where the blood supply to the brain is inadequate. >> reporter: fred warmbier says he's still in shock. >> these things are tough to process. but he's with us. and we're trying to make him comfortable, and we want to be a part of his life. >> reporter doctors say otto warmbier's heart stoppage could have been caused by trauma or drug intoxication. scott, there are currently three other americans in a north korean prison there. >> michele miller, thanks. coming up, a blimp explodes. not all fish oil supplements provide the same omega-3 power. megared advanced triple absorption is absorbed three times better. so one softgel has more omega-3 power than three standard fish oil pills. megared advanced triple absorption. this clean was like pow! everything well? my teeth are glowing. they are so white. step 1 cleans. step 2 whitens. crest [hd]. 6x cleaning*, 6x whitening*á i would switch to crest [hd] over what i was using before. ♪

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today police in washington issued arrest warrants for a dozen members of the turkish president's security detail. they're accused of attacking protesters outside the turkish embassy during president erdogan's visit last month. turkey claims it was self-defense. all 12 are believed to be back in turkey. today london's police commander said that he hopes the death toll does not reach triple digits in that high-rise apartment fire. 17 bodies have been recovered, but it may take weeks to search all 24 stories. in wisconsin today a blimp flying over the u.s. open golf tournament crashed. it deflated in mid-air and caught fire. the only person on board was the pilot. he was badly burned. we do not know why it deflated. we'll be back in a moment.

it's time to ask whether the attack on the united states congress yesterday was foreseeable, predictable, and to some degree self-inflicted. too many leaders and political

commentators who set an example for us to follow have led us into an abyss of violent rhetoric which, it should be no surprise, has led to violence. yesterday was not the first time. in december last year a man with an assault rifle stormed into a washington-area pizzeria to free child sex slaves whom hillary clinton was holding there. or at least that's what political blog sites had said. he fired into a locked door to discover no children in chains. bernie sanders has called the president the most dangerous in history, and shooter yesterday was a sanders volunteer. you might think that no sane person would act on political hate speech. and you'd be right. the trouble is there are a lot of americans who struggle with minlness. in february the president

tweeted that the news media were the "enemy of the american people." later, at a lunch for reporters, president trump was asked whether he worried that that language would incite violence. his pause indicated it had never crossed his mind. and then he said, "no, that doesn't worry me." as children we're taught "words will never hurt me," but when you think about it violence almost always begins with words. in twitter world we've come to believe that our first thought is our best thought. it's past time for all of us. presidents, politicians, reporters, citizens, all of us, to pause, to think again. and that's the "overnight news" for this friday. for some of you the news continues. for others check back with us a little bit later for the morning news and "cbs this morning." from the broadcast center in new york city, i'm scott pelley.

>> announcer: this is the "cbs overnight news." welcome to the "overnight news." i'm tony dokoupil. the special counsel investigating russia's interference in the presidential election could now be focusing on president trump. specifically whether mr. trump tried to obstruct justice in the case of his fired national security adviser michael flynn. jeff pegues has the latest. >> reporter: the president's tweets came after the "washington post" reported that he is now the subject of an obstruction of justice investigation. his response, "they made up a phony collusion with the russians story, found zero proof. so now they go for obstruction of justice on the phony story. nice." cbs news has learned that special counsel robert mueller will interview director of

national intelligence dan coats and nsa director admiral mike rogers amid reports about whether the president pressured them to tamp down the investigation into allegations of collusion between the trump campaign and russia. >> do you solemnly swear to tell the truth? >> reporter: a week ago former fbi director james comey told senators he believes he was fired by mr. trump because of the fbi's ongoing russia investigation, which comey was leading at the time. >> do you believe this will rise to obstruction of justice? >> i don't know. that's bob mueller's job to check that out. >> reporter: ron hosko, former associate director of the fbi, says while obstruction of justice is hard to prove the allegation itself could hurt the president. >> don't you have to prove intent? >> getting to intent to obstruct or impede-s going to be very important. and it could be that they never are able to build that case in a meaningful way. however, damage could be done. political damage could be done during the process. >> reporter: mueller's

appointment a month ago to oversee the investigation drew bipartisan praise. the white house even interviewed him to fill the vacant fbi director job on may 16th. but as mueller's investigation gained traction, the president's allies began accusing him of trying to undermine the trump presidency. and the president himself has chimed in, tweeting this afternoon, "why is it that hillary clinton's family and dems' dealings with russia are not looked at but my non-dealings are?" >> investigators are still trying to piece together the chain of events that led to the ambush of a group of republicans. they've recovered the gunman's camera, computer, and cell phone and raided his house. nancy cordes has the latest. >> he's in some trouble. >> reporter: president trump issued a sobering update today after visiting house majority whip steve scalise last night. >> he's a great fighter, and he's going to be okay, we hope. >> reporter: scalise underwent his third surgery today.

democrat cedric richmond is a close friend and fellow louisianan. >> it's no secret that the bullet split up and that vital organs are -- were hit. >> reporter: another victim, lobbyist matt mika, has been upgraded from critical condition to serious. but his family warns matt was shot multiple times in his chest and arm, he requires assistance to breathe and will need additional surgeries. house republicans gathered at the capitol to sign get well cards. meanwhile, fbi agents continued to comb the scene. an alexandria, virginia ballpark. they are processing a cell phone, a computer and a camera found in the shooter's van. the atf has determined that 66-year-old james hodgkinson of illinois purchased his highly lethal rifle and handgun lethally, firing dozens of rounds before he was shot and

killed by police. hodgkinson's facebook page was filled with anti-trump, anti-gop messages, leading a few conservatives to blame -- >> an increasing intensity of hostility on the left. >> reporter: new york republican chris collins told a local radio host -- >> i can only hope that the democrats do tone down the rhetor rhetoric. some people react to things like that. >> how dare they say such a thing? >> reporter: democratic leader nancy pelosi argued she's endured hostile right-wing rhetoric for years. >> so this sick individual does something despicable, and it was horrible what he did. hateful. but for them to all of a sudden be sanctimonious as if they don't -- have never seen such a thing before. >> reporter: late today the shooter's widow addressed the media for the first time. >> i can't believe he did this. i cannot believe -- and i just

want you all to go away and leave my neighbors in peace. they don't deserve this. i don't deserve it. my daughters don't deserve all this. two capitol hill police officers are being hailed as heroes for stopping what could have been a massacre. chip reid has that story. [ gunshots ] >> reporter: moments after the shooting began two special agents with the capitol hill police, crystal griner and david bailey, charged onto the baseball field, exchanging fire with the shooter. >> i saw him train his gun at me. everything around me started to pop. i got hit in the leg. >> reporter: congressional taffer zach barth told "cbs this morning" he somehow made it to the dugout where survivors say they would have been sitting ducks if not for their protectors. >> thank the lord for special agents griner and bailey. without them i don't know that i'd be talking to you right now. >> reporter: agent crystal griner was shot in the ankle.

a 2006 graduate of maryland's hood college, she was a star basketball player, known for her strength and athletic ability. a teammate told us she was very aggressive and was not at all surprised how she responded in a dang dangerous high-pressure situation. retired capitol hill police chief kim dine. >> she is amazing and she's a hero. she epitomized what being a hero's all about. >> reporter: agent david bailey injured his ankle during the chaotic gun battle. he's from brazil and graduated from north carolina central university in 2007. >> he always talked about becoming a police officer. >> reporter: friend rachel brooks says he just wanted to help people. >> as soon as i heard that, the first thing i thought was that is definitely just like david to do. a criminal investigation has been launched in the deadly high-rise fire in london. fewer than two dozen bodies have been recovered so far, but the death toll could end up topping 100 once firefighters are able to search the upper floors. jonathan vigliotti reports.

>> reporter: the building behind me looks like a skeleton. many of these floors completely gutted by these flames. firefighters are actually back here on the scene battling hot spots, these small pockets of flames. fire officials say at this hour this building is still too dangerous to gain total access inside. the morning after reveals what a day of raging flames did to this 24-story apartment. the damage so severe fire officials say it will take weeks to inspect each and every floor. for now drones are the safest tool for investigators. the cause of the fire is still unclear, as is how it spread so quickly. fire experts believe the cosmetic cladding, or siding, recently added to the building's exterior may be to blame. the fire struck in the middle of the night. trapping many. some seen desperately screaming for help. survivors say they spent years complaining about fire hazards including blocked exits but say the management company wasn't responsive. more than a dozen are still

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russian president vladimir putin is expected to run for an unprecedented fourth term next year. it could be a cakewalk for putin after the russian election commission ruled that his most prominent opponent alexey navalny will not be able to run. navalny was sentenced to 30 days in prison after organizing monday's nationwide protest that sent demonstrators into the streets of more than 100 cities. navalny's sentence is nothing compared to what happened to other opponents of putin. leslie stahl has that story for "60 minutes." >> reporter: vladimir karamerza was an opposition activist on the front lines, protesting putin's policies, organizing demonstrations and town hall meetings. he knew he was on a dangerous mission. when we met him last year, he told us that one day in may 2015

he learned just how dangerous. >> i was in a work meeting with my colleagues in moscow when i suddenly started to feel really sick and i went in 20 minutes from feeling completely normal to feeling like a very sick man. and i don't remember anything for the next month. >> you were out for a month? >> i was in a coma for a week and i don't remember anything for a month and had basically a cascade of all my major life organs failing one after another, just switching off. the lungs, the heart, the kidneys. >> reporter: he was shuttled from hospital to hospital in moscow for two days. as doctors frantically tried to figure out what was wrong with him. >> i was at one point connected i think to eight different artificial life support machines and doctors told my wife that it's only going to be about 5% chance that i'll survive. >> reporter: but he beat the odds. when we spoke with him last year, he'd been recovering for a year. but he was still walking with a limp from nerve damage. >> so what happened? >> well, it was some kind of a very strong toxin. we don't know what it was

because with these things as people who know more about this than i do explained to me, you basically have to know exactly what you're testing for in order to find it. >> so they never found the exact compound. >> they never did. >> reporter: it wasn't till the fourth day and after he'd been on a dialysis machine that blood was drawn and sent to a toxicology lab in france. it found heavy metals in his blood but no specific toxin. still, karamerza maintains that he was poisoned. >> i have absolutely no doubt that this was deliberate poisoning, that it was intended to kill. because as i mentioned already the doctors told my wife it's about a 5% chance of survival and when it's that kind of percentage it's not to scare, it's to kill. >> can you be sure that what happened to you was directed by mr. putin? >> well, of that i have no idea. i don't know the precise circumstances. i don't know the who or the how. but i do know why. >> [ speaking russian ]. >> reporter: in recent years quite a few of putin's enemies

have perished by swallowing things they shouldn't have. in 2006 russian spy turned kremlin critic alexander lit vin enko drank tea laced with polonium 210. two years earlier the ukrainian politician victor yurchenko had somehow ingested dioxin. he survived but was disfigured. but what would the motive be in the case of the critic vladimir karamerza? cambridge educated, he was for years a washington-based reporter for a russian tv station. so he was well connected and had perfect english, which he used to incessantly criticize the regime on the international stage. >> a government that is based on genuine support does not need to jail its opponents. >> reporter: as if 'tis outspokenness wasn't enough to anger the kremlin, he made matters worse for himself when he joined forces with this man. >> it's death if you cross the putin regime.

>> reporter: bill browder was for years the largest foreign investor in russia, and putin's champion. but he turned into a dogged adversary when his russian tax attorney sergei magnitsky blew the whistle on alleged large-scale theft by government officials. >> we discovered massive corruption of the putin regime. sergey exposed it, testified against officials involved. he was subsequently arrested, put in pretrial detention, tortured for 358 days, and killed at the age of 37. >> reporter: browder was so outraged he joined with vladimir karamerza to lobby the u.s. congress for a law targeting those responsible for that death and other human rights violations. they succeeded. the magnitsky act passed in 2012. it's the first law that sanctions individual russians, 44 so far. >> the magnitsky act is deng ded to sanction, to freeze the

assets and ban the visas for people who commit these types of crimes in russia. >> they can't get to their money, which may be stashed in the united states. >> and so vladimir putin is extremely angry that the magnitsky was going to be passed. he was even angrier when it got passed. and he was even angrier when people started getting added, names started getting added to the magnitsky list. >> reporter: one reason vladimir karamerza is convinced he was targeted is because six people connected to the magnitsky case as he was ended up dead. one of them was boris nemtsov, a leader of russia's opposition and karamerza's partner in lobbying the magnitzky act. >> in february 2015 he was killed by bullets walking home as he always did out in the open without bodyguards. >> this was an assassination. in some of the deaths proving there was foul play has been a challenge. take the case of this russian banker who came forward with

incriminating documents relating to the magnitsky case. >> alexander paraplichny was a whistle blower. at the age of 44 he went jogging outside his home in surrey outside of london and dropped dead. the police deemed it an unsuspicious natural death. >> they did look for poison, they just couldn't find any. >> they did a very first-round toxicology screen. they didn't find anything on the first run-through. >> reporter: detecting poison can be extremely difficult. and there's a reason. this cold war cia memo reveals that the soviets ran a laboratory for poisons in a large and super-secret installation known as the "chamber" to test undetectible compounds. in the kafts bacase of the bank london, the coroner wasn't willing to give up. he ordered more tests, and three years later it was revealed in court that an exotic toxin was found with the help of an authority on flowers. >> a small sample of his stomach

contents was sent to a botanical garden outside of london, and one of the scientists found a compound called gelcimian elegance, which is a chinese herb. they call it's heartbreak grass. and it causes a person to die unexpectedly without explanation. >> reporter: still, there's no direct evidence of a kremlin connection. but the list of those who've come to die unexpectedly after running afoul of mr. putin is long. political opponents and human rights lawyers have been shot. overly inquisitive reporters have perished in mysterious plane crashes or by car bombs, by poison or gunfire. journalist anna poll kofs calla was poisoned and shot. then there are enemies who kill themselves. one by hanging. one by stabbing himself to death with two knives. and one by tying himself to a

chair and jumping into a swimming pool. some of putin's opponents are in prison. others forced out of the country like mikhail khodorkovsky, probably putin's most famous living critic. are you afraid for your own life? >> translator: for a period of over ten years vladimir putin had ample opportunity to make a decision about putting an end to my life. in a very easy way. just by snapping his fingers. and today it's a little bit more difficult. >> reporter: khodorkovsky was once the richest man in russia, until he took to opposing putin. he was put on trial, his oil company confiscated, and then thrown in prison for ten years. home is now london, where he funds a russian pro-democracy movement. and this is where the plot thickens because one of his senior organizers on the ground in russia is none other than vladimir karamerza. there are people who say that what's happened to karamerza is

a message to you, a message to you to back off. >> translator: you know, for ten years i was receiving lots of messages from authorities of various sorts. and some of these messages were unpleasant concerning my physical well-being. but the authorities saw i ignored these messages. i would like to believe they have not forgotten that. >> and you can see the full report on our website, cbsnews.com. the "overnight news" will be right back. there's a new essence in new herbal essences it's bio:renew a blend of sea kelp, aloe and antioxidants that help bring your hair back to life. new herbal essences. let life in.

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spray and wash. better on over 100 stains. president trump has threatened to punish companies that make products overseas, then import them into the united states. but his own clothing line, the donald j. trump collection, is made in foreign countries. china, bangladesh, honduras, and vietnam. meanwhile, there are a lot of businesses here in the states who are redefining what it means to be made in america. i visited one in new jersey. bustling garment factories are what you may expect to find in a far-off foreign land. but this is northern new jersey, and the only thing here that's not made in america is the owner. >> it gets broken when half of it is here and half of it is outside. >> reporter: suchi ram esch was born in india and came here a decade ago to work in technology.

>> i'm very much a nerd. >> reporter: but a couple years ago she quit to found suuchi incorporated hoping to revive an industry many left for dead. >> people think immigrants are taking american jobs. how do you feel about that? >> i honestly feel like you can't separate the immigrant from the american. when you think of america you think of people that have achieved their dreams, that have been successful. and in many ways that is an immigrant. >> reporter: suuchi now employs 60 people, producing clothes for other businesses including uniforms and small batches for young and not so young designers like frank bruno. >> i'm a startup company. >> reporter: after decades in blue-collar jobs bruno decided to launch a line of blue-collar shirts. >> but see, it's unique. it's a different color. >> reporter: and when it came to making them, it had to be american. >> does it surprise you that your american-made clothes are in a factory founded by an indian-born businessperson? >> yes. and it pleases me. because this is what it's all

about. this is the american way. >> reporter: while it costs about 20% more to make clothes in america, suuchi says the trade-off is unmatched speed, quality, and flexibility. >> china and india and bangladesh are not set up to meet where retail is heading. and when your supply chain is halfway around the world, it just by default cannot service these needs. >> creativity happens when you are combining two new things. >> reporter: nyu economist petra moser says immigrant entrepreneurs have a long history in the u.s. >> go back as far as andrew carnegie, who came from scotland and then built a very, very large industrial, you might even call it an industrial empire, and created many, many jobs. >> reporter: suuchi now plans to add 40 more jobs by the end of the year, a reminder that immigrants don't always take work from americans. they create work too. >> if you have hard-working

people and

school's out in southern california, and that means beach time. except for all the sharks. jamie yuccas has that story. >> reporter: this is the first week of summer here, and that usually means parents are dropping off their kids to surf camps or the junior lifeguard programs. but with so many great white sharks spotted just offshore, some as big as 12 feet, businesses report numbers are down even with the surf up. >> who's ready to surf? >> me! >> reporter: sun shining, waves ready to ride. and this year sharks lurking offshore. after dozens of sightings, local businesses are feeling what some are calling the shark effect. for surf camp owner john pierce this is his lowest attendance in 16 years. >> normal year we'd have like 20-plus kids in a class and i'd run two classes in a day.

we'd be full all summer with wait lists. >> reporter: his business is down more than 50%. some surf camps are canceling classes entirely. from board rentals to junior lifeguard programs, fewer are willing to get in the water. >> the mom will say, i'm so sorry, i talked to my husband and it's just that one chance. they're just nervous. >> reporter: candice lazar is one of those moms. since may her family witnessed shark sightings and beach closings. that's why at the last minute she decided daughter sloan would sit camp out. >> you have to live your life. it's hard. it's hard to figure out how to react because you don't want to overreact. >> there's that chance. >> yes, there is. >> and that does weigh on your mind. like what if i put my kid in the surf cam. and something happens. you'd never forgive yourself. >> oh, my gosh. you would never forgive yourself. and i think that's why i took the step when i did. there were just so many reports, one right after the other, and it was just getting out of hand. it was crazy. >> reporter: within the last year alone, two shark attacks

took place within a 25-mile stretch of southern california beaches. on april 29th a 36-year-old mom lost part of her right leg. she remains hospitalized. -guards now begin each morning scanning the water for sharks. >> the area is shark-free and junior guards will go on as scheduled for the day. >> reporter: san clemente lifeguard chief bill humphries says the predators impact crowds. >> the bigger pirk is there's far more sharks than there's ever been in this area. it's an anomaly right now. >> reporter: 11-year-old ava mcgovern had to convince her mom to let her train as a junior lifeguard in a group, but even she doesn't want to hang in the ocean alone. >> i'm a little scared of the sharks. >> do you usually surf? >> i did surf. but now i'm not quite sure if i am going to surf like for a long time now because of the sharks. >> and that's the overnight news for this friday. for some of you the news continues. for others check back a little bit later for the morning news and of course "cbs this morning." from the broadcast center in new

york city, i'm tony dokoupil. . more surgery for scalise. >> he's in some trouble. >> dr. the being investigated for obstruction of justice. mr. trump fires back on twitter, of course. this morning a look at what obstruction charges could mean for the presidency and how vice president pence is protecting himself. and on the run for several