♪ ♪ captioning sponsored by cbs >> reena: the assassin's plan of attack, new details about the army veteran who killed five police officers in dallas. plus the unusual use of a robot to take down the sniper. also tonight, we're learning more about the fallen heros who died in service to their community. in a rare weekend news conference, president obama weighs in on racial tensions, and police shootings. >> america is not divided as some have suggested. >> reena: and across america, peaceful demonstrations and violent protests against police brutality. this is the "cbs weekend news." >> reena: good evening, i'm reena ninan. president obama is cutting short

his trip to europe to visit dallas week. the city is mourning the deadliest day for law enforc enforcement since 9/11. a sniper killed five officers during a protest on thursday. seven officers were wounded along with several civilians. all are expected to survive. the gunman, an army veteran, targeted the officers in revenge for the deadly police shootings of two black men this week. alton sterling was killed in baton rouge, louisiana, tuesday. and philando castile was shot in suburban st. paul minnesota on wednesday. we begin in dallas with manual bojorquez. >> reporter: f.b.i. teams spent saturday mapping a crime scene that extends over 20 square blocks a painstaking process that's got parts of downtown dallas frozen nearly 48 hours after the attack. the ambush happened thursday night when this gunman opened fire on officers after a march protesting recent police shootings of black men. the gunman, 25-year-old micah xavier johnson, an army veteran,

targeted white officers in revenge. [ gunfire ] he was killed by police during a standoff. today at a memorial for the fallen officers, mayor mike rawlings urged his city to unite. >> it's all about race. it's all about race. let's get over it. build the bridge, and let's get over it. >> there's so much hate, evi evilness towards each other. it's just, it's just ugly. >> you know what? there's a lot of people that support our cops. there's a lot of people that support everybody, because in the end of the day, it's all lives matter. >> the pain. >> reporter: the pain here is felt by even the youngest. >> hurt right now. >> reporter: it's also the youngest who are providing comfort. >> want to give him a hug? >> reporter: officer ira carter knew the fallen officers. >> you gotta start the healing and grieving process and

understand which direction we got to go and pray and hope this doesn't happen in america again. >> reporter: the ongoing investigation here is massive with streets like this one closed possibly into next week. reena, detectives have already interviewed more than 200 people. >> reena: manual bojorquez in dallas, manuel, thank you. investigators say the gunman micah johnson, was amassing an arsenal at his home outside of dallas. jeff pegues has more on the sniper and his troubled past. >> reporter: if there was a turning point in micah johnson's life it may have occurred in 2014 when his army commander forced him out of the military. at the time, johnson was being accused of sexual harassment. a military lawyer who represented him tells cbs news that the woman involved wanted johnson to seek "mental help." then in may 2015, about a month after the official end of his military career, police in richardson, texas, responding to a suspicious person call, found

johnson sitting in a black tah tahoe. the incident was resolved without an arrest or charges. cbs news has learned that dating back to 2014, investigators believe johnson began building what amounted to an arsenal. he was stockpiling guns and gathering the elements to build explosives. [ gunfire ] >> reporter: a search of his home after the deadly shootout with police found weapons, bomb-making materials and a journal which officials say was a manifesto of cover and conceal tactics. the same kind of techniques he used on the streets of dallas. ron hosko is a former f.b.i. assistant director. >> was that guy trained to kill? >> absolutely. so he's shooting and moving, shooting and moving. >> reporter: when they finally cornered him, dallas police attached c4 explosives to a robot, like this one. police detonated the device, killing johnson. dallas mayor mike rawlings says it was used as a last resort.

>> he had a choice to come out and we would not harm him or stay in and we would. he picked the latter. >> reporter: when he was surrounded by dallas police and talking to negotiators, johnson said he was acting alone. reena, investigators say they have not found any links to domestic or foreign extremist groups. >> reena: thanks, jeff. we're learning more about the five officers who were killed, four were fathers, three were veterans. omar villafranca has their story. >> reporter: 48-year-old lorne ahrens moved from southern california to dallas 14 years ago to fulfill his dream of becoming a police officer. his wife is also a member of the dallas police department, ahren's father, william. >> the pinnacle of his life was his children. he was a big strong guy, 6'5", a rough and tough guy, but the same guy would have tea with his daughter. >> reporter: before he became a police officer, patrick

zamarripa was in the navy. the 32-year-old loved baseball and his 2-year-old daughter. 40-year-old michael krol left detroit to become a police officer. his family called him a gentle giant. he served in dallas for eight years. sergeant michael smith was on the force for 25 years. he loved his job and his church. he leaves behind a wife of nearly 20 years and two teenage children. brenton thompson -- brent serd s before becoming a cop. he's the first dallas transit officer ever killed in the line of duty. transit officer, misty mcbride, was shot several times, but will survive. her 10-year-old daughter, hunter is grateful she's alive. >> i said that "i love you" and that "i'm glad you're here." >> reporter: inside the dallas police association, vice president mike mata is making space on the memorial wall. do you have more space for four officers? >> you know, um, i wish we didn't, but i guess we're going to have to.

>> reporter: while the nation mourns the five fallen officers, dallas police are trying to heal as a department. >> i made a rule when i had kids that i would never leave my house without telling them i love them and kissing them. and so i'm just going to make sure that i keep thattill the day i die. >> reporter: here at dallas police headquarters, the memorial for the fallen officers keeps growing. reena, visitors here say this is part of the community's healing process. >> reena: remembering the victims. omar villafranca, thank you. in warsaw, poland, president obama addressed the dallas attack. it was a rare news conference for the weekend. margaret brennan has traveled with the president. >> this has been a tough week. >> reporter: president obama acknowledged america's pain in the wake of the dallas shooting but strongly rejected claims that the country's racial divide has deepened. >> so when we start suggesting that somehow there's this enormous polarization and we're

back to the situation in the 60's, that's not true. you're not seeing riots. you're not seeing police going after people who are protesting peacefully. >> reporter: he compared the recent attack to the 2015 massacre of black churchgoers by a mentally-ill white shooter in charleston, and said the dallas shooter was "deeply troubled." >> i think the danger, as i've said is that we somehow suggest that the act of a troubled individual speaks to some larger political statement across the country. it doesn't. >> reporter: but there is racial bias in america's justice system he said, and pointed to videos of police brutality in louisiana and minnesota as evidence. those instances, and the murder

of dallas police, mr. obama said should prove to gun control opponents that easy access to weapons needs to be curbed. >> if you care about the safety of our police officers, then you can't set aside the gun issue and pretend that that's irrelevant. >> reporter: the president is cutting short his trips here to europe and will visit dallas early next week. reena, he'll also gather police and activists at the white house to try to fix what he called the ruptured trust between law enforcement and the communities they protect. >> reena: margaret, thanks. in response to the dallas shootings, police departments and major cities across the country mandating that the officers patrol in pairs on friday in valdosta, georgia, police say an asian man who called 911 to report a car break-in allegedly ambushed and then shot a white officer several times. the officer is expectsed to survive. -- is expected to survive. prosecutors in missouri say another ambush happened near st.

louis when a black man shot and critically wounded a white officer during a traffic stop. and on thursday in bristol, tennessee, authorities say an army veteran who was black shot at passing cars and police. one woman was killed. a police officer was wounded. investigators say that the gunman said he was angry about the recent police shootings of black men. and in houston overnight friday, police shot and killed a gunman who was standing in the road waving a pistol. investigators say officers opened fire when the man pointed his gun at them. across the country this weekend, demonstrators are taking to the streets and raising their voices all against police brutality. teri okita says there's been trouble in several cities. >> reporter: tensions between the public and police boiled over for yet another night. about 1,000 protesters clashed with police, dressed in riot gear, in downtown phoenix. mariah daniels was in the crowd. >> they shouldn't have pepper sprayed anyone. they pepper sprayed children.

if you have to go as far as pepper spraying children, you're the problem! >> reporter: a similar scene played out in baton rouge where alton sterling was killed on tuesday. cameras captured an officer pointing a weapon at protesters. another shows a woman being tackled to the ground. in rochester, new york, as a line of police advanced, demonstrators sat in the street in a show of civil disobedience. police made more than 70 arrests and apologized for detaining two local journalists covering the story. >> justin carter being arrested. >> reporter: the largest turnout may have been in downtown atlanta where thousands marched for justice. police created a barricade of officers and vehicles to keep the crowd off the highway. and in los angeles, the city's mayor and police chief met with some high-profile protesters including rapper snoop dogg. >> a lot of these people back here are outraged because they don't have communication with

the police, and we're trying to bridge the gap and become the communication so we can run down the dialogue back to them as far as what we talked about. >> reporter: snoop dogg, beyonce and now serena williams, fresh off her wimbledon win, have joined lawmakers in calling for non-violence. reena, protesters vow to continue marching until widespread changes in police training are made. >> reena: teri okita following the nationwide protests. coming up next, what one police department is doing to end the mistrust between orsses and minority -- officers and minority communities.

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>> how are you doing,rous? what is going on? >> reporter: camden police sergeant raphael thornton has been an officer for nearly 20 years. thornton who grew up here now commands the neighborhood response teams training officers to get out of their patrol cars and engage with members in the community. >> you're going to have to fight and scrap and earn the community's trust. >> reporter: in 2013, camden replaced its entire police force once plagued by deep budget cuts and corruption. >> hello, how are you doing today, sir? >> reporter: the new department is half minority with fewer desk jobs and squad cars because they want more boots on the ground. >> you can't just see a criminal. you can't. you got to see a man. and you have to have respect for each other. >> reporter: camden's new training emphasizes de-escalation. >> drop the knife! sir, drop the knife. >> reporter: they point to this incident which was captured on the police body camera last year. officers kept their distance and talked to the man to drop his knife. lieutenant kevin lutz says the

officers eventually used non-lethal force, which is all a part of their training. >> the officers were able to communicate, provide distance, time and cover. >> reporter: lieutenant lutz says handcuffs and service weapons are tools of last resort. they say that the new training is paying off. over a period of three years, homicides are down 52%. >> not everybody is going to be able to be de-escalated, but i think through this training, if we're able to have them thinking morally, have them acting ethically, then more often than not, those deadly force encounters can be avoided. >> reporter: reena, just four years ago, camden was one of america's most dangerous cities. last year, president obama praised the department for its efforts to build better relationships with its community. >> reena: demarco, thanks for that report. still ahead, new officers joined the force, an extremely the force, an extremely difficult time for police.

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law enforcement. here is mireya villarreal. [ applause ] cheerp cheerp. [ bagpipes playing ] >> reporter: the stage was set for a celebration. >> today was supposed to be a happy day, but we come here today with tears in our eyes. >> reporter: but weighing heavily on the minds and in the hearts in attendance for the images from dallas. los angeles mayor eric garcetti. >> you didn't become police officers out of fear. you became police officers out of hope. you didn't become police officers because you were scared. you became police officers because you love. >> reporter: trina nunnley's daughter, felicia, was one of 40 new cadets to join the l.a.p.d. you've seen baton rouge and minnesota. now you've seen what happens in texas, um, police departments are under fire. does that worry you having a daughter on the department now? >> yes, of course, it worries me. and they target the policemen but on the other hand, i'm there

i'm there with her, so if something happened to her, it happens to me, too. >> you joined a profession today that is at a very difficult crossroads. >> reporter: chief charley beck personally welcomed each new officer. >> have empathy. try to look into people's hearts and you must always do the right thing. >> reporter: nick wilts graduated at the top of his classs. >> i see also the black band that you're wearing today. carry those men with you as you're out on patrol? >> yes, ma'am, definitely. we're all grieving and heartbreaking. >> reporter: but carrying the grief, he says, will always be part of the job. >> if, you know, something tragic happens, you don't get a moment to pause. you have to get back out there and serve the community. that's what we're doing. >> reena: next to come on the cbs weekend news, steve hartman with the one word that could

help the nation heal following a week of deadly violence.

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that's why we turn to tears. that's why we bow our heads. that's why we stare blankly at our tv screens whenever they fill with the kind of horror we've seen across america this week. >> i told him not to reach for it! i told him to get his hand off it! >> steve: i may be a writer, but i've got nothing for you today, not to make it better, but i do have one word that i think could help de-escalate this crisis. it's a word that has been noticeably absent from most of the protests. you don't see it on signs or facebook meems -- memes because it's not a word that insights people. the missing word is "some." as in "some police are bad." or conversely "some police shootings are justified." and it doesn't have to be "some," any little modifier that takes the blanket out of the statement could make a big difference in tone. i was struck yesterday by an interview with michael mcclanahan, president of the

naacp in baton rouge, who went out of his way to include the modifier. >> what we're going to do today is root out the 1% of the bad police officers that go around being the judge, the jury and the executioner of innocent people. period. >> steve: what if we all followed that lead? what if at the next march, people shouted "black lives matter and good cops know it!" or "all lives matter, but we recognize it's mostly the black ones that are being lost." just because our skin colors are black and white doesn't mean we can't speak in shades of gray or as the dallas mayor put it, words matter. >> i think that we have a tone in this country right now that our bellicose nature comes through our mouths and we need to shut them and we need to listen. >> steve: good advice, because when it comes to race in america we can retreat to our corners, but at the end of the day, we're still sharing the same room.

steve hartman, cbs news, new york. >> reena: that's the "cbs weekend news" for this saturday. later on cbs, a special edition of "48 hours" bringing a nation together. the broadcast begins 10:00 eastern time 9:00 central time. the news continues always on our 24-hour digital network, cbs cbsn@cbs news.com. i'm reena ninan in new york. thank you for joining us tonight. good night. captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org

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