also with us is john clark, former u.s. marshal, service chief inspector, who ran a multiagency fugitive task force in southern california. gentlemen, thank you very much for joining us. we appreciate it. john clark, let me get your thoughts in terms of where we are right now, on what we've learned out of boston. >> it's obviously still very much a physical manhunt in the watertown area. they are still doing door to door searches, executing search warrants, in places that have been known to be associated with the suspects. but at the same time, behind the scenes and a lot is going on, as far as developing information about everything that ever has been in contact with the suspect, finding out who his associates, friends, family are. every piece of paper that he ever filled out that may have a reference on it, those types of things are being compiled to find out who he is, and where he might be headed. >> and craig dotlow, all of this being compiled as law officials look for the brother at large, dzhokhar tsarnaev. do you ex

clark. the maysles. john cassavetes.cheting bullets) (jazz music playing) (peter biskind) all these kids were steeped in old hollywood movies, the movies of john ford and howard hawks and particularly in hitchcock. films were filled with homages to one director or another, and often entire films, particularly brian de palma's became reworkings of hitchcock's films. surprise. hey, now you know you're not supposed to cut the cake until you make a wish and blow out the candles. well, i was very interested in that period of my career of learning how to express as clear in images as possible. and many directors of course are drawn to hitchcock. so i patterned something on very much like "psycho" and then created ways of characters observing others and following each other and learning specific hitchcock vocabulary. (loud, disturbing music) what is cinema and how do you express things in purely cinematic terms without trying other forms, which are, basically, me talking to the camera. (loud, disturbing music) it did become a l

clark. the maysles. john cassavetes.cheting bullets) (jazz music playing) (peter biskind) all these kids were steeped in old hollywood movies, the movies of john ford and howard hawks and particularly in hitchcock. films were filled with homages to one director or another, and often entire films, particularly brian de palma's became reworkings of hitchcock's films. surprise. hey, now you know you're not supposed to cut the cake until you make a wish and blow out the candles. well, i was very interested in that period of my career of learning how to express as clear in images as possible. and many directors of course are drawn to hitchcock. so i patterned something on very much like "psycho" and then created ways of characters observing others and following each other and learning specific hitchcock vocabulary. (loud, disturbing music) what is cinema and how do you express things in purely cinematic terms without trying other forms, which are, basically, me talking to the camera. (loud, disturbing music) it did become a l

. >> amarosa fighting back after latoya's cold comments about michael clarke duncan. also john

clark. she once defended jared loughner, the tucson shooter. joe johnsns me tonight along with nick payton walsh. this female dna found on one of the pressure cookers, what more can you tell us? what might it mean? >> there's no way to tell at this point, quite frankly. what could it mean, we don't know. one law enforcement source said the dna could belong to anyone who came in contact with any of the consumer products that were used to make the bomb. just the same, they want to see if they can track it down and of course, they started with the wife of the widow of tamerlan tsarnaev. >> so joe, you can't assume that it was somebody who helped make the bomb. it could be the hair of a salesperson who sold one of the components, you're saying? >> that's right. it may well not implicate anyone of anything, anderson. they have apparently been trying to get am the widow for a couple of days now but all we know at this point, they have dna, we're not even sure whether they mean a hair or what, and apparently, it belongs to a female. >> so erin, you saw investig

johns is working this part of the story. you're getting new information. i suspect by judy clarke coming in, that seems to be a signal they're going to do whatever they can to avoid the federal death sentence for this suspect, joe? >> reporter: that would certainly make sense, and obviously in death penalty cases that is generally the way the story goes, wolf. what we can tell you, though, is that we do know preliminary talks have been under way for a while, perhaps the last several days to -- between the justice department and the defense team to try to, at the very least, open up the door so the surviving suspect, dzhokhar tsarnaev, can actually restart conversations with investigators and obviously, as a part of that, wolf, the question would be whether the death penalty could be taken off of the table. quite frankly, at this stage, the justice department has not said whether it will pursue the death penalty in the boston bombings cases. however, taking it off the table would pave the way for, you know, some type of a life sentence presumably for an individual. that's the kind

clark rockefeller is a liar, but do jurors believe he's also a killer? heather is here with the latest. >> reporter: closing arguments take place in los angeles today in the cold case murder of johnandlord of the man who called himself clark rockefeller. now, what is so hard about this case for prosecutors is that there's no clear motive, and there's very little evidence to go on. the trial, on trial today is christian gerhart schroeder, and he's the one who claimed to be a member of the wealthy rockefeller family for decades. he had deceived acquaintances and even his own wife. he's accused of hilling john back in the '80s when he rented a home from him and his wife. the skeletal remains were found on the property in the mid 18990s -- 1990s, you can see a picture of him right there, and that is when new homeowners were digging in the yard to build a swimming pool. his wife, linda, was believed to have been killed at the same time, but her body has never been found. defense attorneys are trying to show reasonable doubt, and they suggest that linda may have killed her husband before fleeing. prosecutors say that gerhart schroeder is simply a master manipulator who ran from the sce

clarke of california to tsarnaev's defense team. she has represented a number of high profile clients, including jared loughner, the accused tucson mass shooter and interesting to note here, john high profile clients have received life in prison, rather than the death penalty. >> she has a great deal of experience in this field, pamela, to be sure. as we mentioned before the boston herald reporting that examiners have determined a cause of death for tamerlan tsarnaev but they're not telling us. why? >> that's right. and that's because, john, no one has claimed his body. the examiner's office tells us that essentially tamerlan's widow, katherine russell, and his family members haven't come by to claim his body. so until that happens, the officials aren't going to release any details about his cause of death. as you mentioned, they have determined his cause of death. john? >> all right, pamela brown in devens, massachusetts this morning. thanks so much. appreciate it. meanwhile, federal investigators want to know if boston bombing suspect tamerlan tsarnaev ever knew a man named william slotnikov. our nic robertson is in dagestan. what do we know about this figure? >> he was 23 y

john muller and diana perez. >>> we begin this half hour with the boston bombing investigation. dzhokhar tsarnaev is getting high-powered legal help. >> his legal team will now include prominent attorney judy clarkunabomber off death row. abc's tahman bradley is following the developments. good morning. >> reporter: good morning. investigators are focusing in on the suspect's training. bottom line is they think the two brothers had help. the investigation is continuing in both boston and russia. this new video shows the surviving boston marathon bombing suspect dzhokhar tsarnaev teasing his niece. it's the first time we're hearing his voice. >> give me a kiss. >> okay. >> no, give me a kiss. that a girl. now get out. >> reporter: that playful young man now sits in a solitary 100 square foot cell in the devons federal medical center facing possible death sentence on terrorism charges. abc news learned authorities are widening their net and looking for possible accomplices. now, almost a dozen people are considered persons of interest. sources familiar with the probe say investigators have discovered female dna on one of the bombs. it's unclear whether it came from a victim, someone who handled co

suspended indefinitely and secretary of state john kerry is quoted as saying we're part of the way there to bringing the suspects here. >> let's go to richard clarkeh us, former counterterrorism advise rer to presidents clinton and bush. from everything we're leshg now, richard, over the last several hours about this operation and the young men and about what the suspect may be preparing to do right now, where does this fit in, where does this rank in the kind of terrorism threats we have been preparing for? >> george, we have never had anything like this where an entire city has been put to lockdown, we have seen college campuses on lockdown, not a million people, this is similar in a way to the washington sniper incident that we had over ten years ago, the kind of thing that the government officials had been worried about before 9/11 that a few people, one or two people, with the right weapons could put a whole met metropolitan area into fear, it doesn't take much to put a whole metropolitan area into lockdown and they achieved the terrorists, achieved what they wanted to achieve that way. to get attention to them. >> jonathan karl is with us as

clarke kellogg. have you seen anything like the outpouring of support for kevin ware? >> i can't recall, john.ere courtside on sunday, myself and our cbs broadcast crew. it was emotional, gut wrenching, to see him undergo that kind of injury, yet the outpouring of support from his team, his coaching staff, was really something i've never been a part of in an athletic event, and i'm happy to know that he had successful surgery and he seems to be on his way to what will be a long and hard recovery. but seems to be in good spirits and hopefully we'll see him here on saturday. >> very emotional time for him. i was watching interviews of him last night, he was crying. good to see he's in good spirits. let's talk about the final four. he wants his team to go on and win. let's talk about the final four. teams have arrived in atlanta now. who do you like? >> well, i like them all. obviously, we'll be courtside, my colleagues and i calling the game, so i won't offer a pick as to who i think will win, but i'm hoping for competitive games, all four teams have earned their way here, done it in different w

clarke of california, the experienced death penalty lawyer, to tsarnaev's defense team. she has represented a number of high profile clients, including jared loughner, the tucson mass shooter, and interesting to note here, john, that most of her high profile clients have received life in prison rather than the death penalty. >> unabomber ted kaczynski, as well. pamela brown live for us in devens, massachusetts. thanks so much, pamela. kind of a milestone moment here in boston overnight. we saw them repainting the finish line, the spot where the runners crossed the finish line here in boston on boylston street. traditionally they repaint the finish line the night of the marathon after the runners finish the race. this year for obvious reasons that whole process was delayed by a couple weeks. if you want to know the impact, the reach of the story here in boston it' fl players coming out at the same time to lessen the media burden. maybe the nba. but nobody expected jason collins to be coming out on the cover of "sports illustrated." giving you insight into just how much of a surprise this was his twin brother, who also played in the nba at one point said he didn't know that jason, his lifelong best friend, was

john ho sohuz. >> reporter: he disappeared with his wife in january 1985. gerhardt passing himself off then as british royalty dispirited himself soon afterward. he crisscrossed the country until, as clarkt named sandra bost to marry him and hand over control of her finances, too. but the couple had a daughter, nicknamed snooks. and when bosh figured out her husband was a fraud and divorced him, he kidnapped snooks, only to be caught and convicted of that crime. he was connected to the remains of john sohuz discovered when the new owner of the old property was putting in a swimming pool. gerhardt told natalie during the kidnapping case he was not a murderer. >> i believe in nonviolence. and i can fairly certainly say that i have never hurt anyone. >> reporter: the defense attorney said the jury in this case believed otherwise for one reason. >> they didn't like him at all. they hated him. they were laughing at him openly. >> what was basically a circumstance ctial case, they convicted him with a possible life sentence. prosecutors believe linda is dead, and that gerhardt killed her, too. but her body has never been found. >> thank you, mike. "dateline" will have much more on this story