is like dealing with a bowl of jell-o. they refuse to get serious about cutting spending and making the tough choices that are facing our country on entitlement reform. that's the bottom line. >> president obama has asked them to come to the white house to tell them how he plans to avoid closing on the debt deadline. he was confident they could reach a deal, but now he said he would be at the white house tomorrow. so, is he backing off? chief white house correspondent jessica yellin joining me now. both sides putting their own spin on things. what happened today? >> i'll tell you from here at the white house, when the president received the call from speaker spoener saying the deal was off, i am told there was a sense of surprise, frustration, even exasperation that congress can't come to negotiate a real deal. this is now the third time what seemed directionally leading to an actual deal broke down, and this time it seems to be over the question of taxes. in this instance, they had come to significant agreement over spending cuts and entitlement reform, but it broke down along the lines of just how much tax revenue was on the cable. both said $800 billion were on the table, there was a question of another $400 billion. the president said he was open of negotiating it, but for speaker boehner, it appears it was a deal breaker. now, with less than ten days go, nee deal, and each side blaming the other again with this time -- the clock ticking and each side not sure how the deal will get done. >> yeah, indeed. they raised the stakes earlier on, making a big deal saying he no longer wanted to work with the white house, and yet we're hearing he's going to be at the white house tomorrow morning for more meatings. how is the white house iraqing to this? >> there's a lot of talk about the fact the president has put in repeated calls to speak eer boehner as the president tells it, in order to get a response. the white house made an outreach, an overture of the outline, and the president called speaker boehner's office first, and was told that speaker boehner wasn't available to talk to the president. this is not your stand protocol in president. you make yourself available to talk to the president or shortly thereafter. there is frustration about that expressed here, but there is still an openness and a willi willingness on both sides to negotiate because everybody wants to get the debt ceiling raised, and here, also, they say maybe this obama/boehner framework could be the deal in the end, so it's still not off the table from this perspective. >> you say there's a willingness on both sides to talk, but the bottom line is can they reach a deal? what happens next, jessica? >> there's a meeting at 11:00 tomorrow morning. the congressional looders will then go off and talk about how they can get a negotiation done. they need a handshake agreement by sunday night so congress can take action next week. isha? >> okay. we appreciate it. thank you. we now go to norway where the death toll from the terrorist attack is at least 17. dozens were injured. in one attack, a bomb ripped through the center of oslo, attacking government buildings. the blast could be felt for miles. the other attack was outside the capitol at a political youth camp where a man opened fire. a man rushed to the scene and described what he saw after his boat reached the shore, dead bodies, youngsters who appear to have been gunned down as they tried to hide. >> they run down to the shore to seek shelter, but then they died on the spot there together. >> well, tonight, a norwegian man is in custody and police say there are no ideas on a motive. we're joined by phone. you were in bed when these blastzs happene eed describe to what you heard and what you saw. >> lest you think i'm lazy for being in bed. i flew from new york to oslo overnight. i'm a pilot, we got in about noon time. i slept for a couple hours before i was going to get up and make an afternoon of it. right at about 3:30, there was an extreme concusive explosion, and i thought maybe my bed had been struck by loigening and maybe at the same time, an earthquake had struck. it was so forceful, it violented shook the hotel i was in, which was a large tower downtown. i sensed there must be something wrong and looked outside to see a wall, a giant cloud of dust and smoke rising from the plaza area where the bombings occurred. and i could see the debris spreading outward and people kind of being covered with it in the same sense that i saw on september 11th living in new york city. i had many of the same visual cues from the attacks of september 11th, 2001. >> update our viewers, this is a fast-moving story. we're getting word from norwegian police that the death toll could rise to 80. right now, the number is 17. this is the latest information we're getting. they're now telling us that the death toll could rise significantly and it could rise to 80. to go back to what you were describing in terms of the af r aftermath, i read report of the absolute panic breaking out in this city center. talk to me about that. >> from my viewpoint, actually, i didn't see so much panic as a state of disbelief and confusion. i think it's been reported about how safe norway feels and oslo is a tame and organized city, and there was very much a feeling that this must not be happening. we must be misunderstanding the situation. at least from what i could see, which was in the immediate vusinsty of the plaza area but not the plaza itself. people were more confused and stunned. i didn't see people running for a few minutes there was general confusion. and then the emergency response started to take over, and you could see they were rushing in to treat the injured and stabilize the situation. >> norway is a shocked and stunned country tonight as they take in the events that have taken place. ian yojoining us, we really appreciate it. stay safe. stay with cnn for the latest developments on the latest breaking news in norway and in washington, and new developments in the casey anthony story this week. we'll get to this in anderson cooper's story, crime and punishment. that's next. i have astigmatism. my old contacts would sometimes move and blur my vision. then my eye doctor told me about acuvue® oasys for astigmatism. he said it's the only lens of its kind designed to realign naturally with every blink so now, i'm seeing more clearly. [ male announcer ] learn more at acuvue.com. ♪ i like your messy hair ♪ i like the clothes you wear ♪ i like the way you sing ♪ and when you dance with me ♪ you always make me smile [ male announcer ] we believe you're at your best when you can relax and be yourself. and at thousands of newly refreshed holiday inn hotels, you always can. holiday inn. stay you. and now stay rewarded with vacation pay. stay two weekend nights and get a $75 prepaid card. desperate for nighttime heartburn relief?y. for many, nexium helps relieve heartburn symptoms caused by acid reflux disease. talk to your doctor about your risk for osteoporosis-related bone fractures if you take multiple daily doses of nexium for a long time. possible side effects include headache, diarrhea, and abdominal pain. other serious stomach conditions may still exist. talk to your doctor about nexium. if you can't afford your medication, astrazeneca may be able to help. distracted driving. it accounts for 25% of car crashes. - ♪ [ dance ] - music, cell phones, food-- the list goes on. this is why safe driving is so important. - correct. - and it's why the best agents... help safe drivers get a lower rate. - oh! - exactly. ♪ another dream but always you ♪ whoa! ♪ it's like a vision-- [ tires squeal ] ♪ [ resumes ] [ man announcing ] we are insurance. ♪ we are farmers bum-pa-dum, bum-bum-bum-bum ♪ this is an anderson cooper special report, crime and punishment, most notorious crime. today, the social chameleon who pretended to be a rockefeller. also, the kings of hip-hop cut down at the height of fame, and the san francisco zodiac killer. and also some developments in a murder that has gone unsolved since 1947, l.a.'s black dahlia case. now a former police detective says he knows who the killer is and it's a shocker. his very own father. a big hour ahead tonight with america's best known crusader for justice, john walsh. also anderson, dr. drew pinsky and me. we begin with casey anthony. a little more than two weeks after a jury in orlando acquitted her in the death of her daughter caylee, a new revelation. something the jury never heard that's raising even more doubt about the prosecution's case. the latest from martin savidge. >> reporter: it was one of the most powerful elements of the prosecution's case against casey anthony. >> okay. let's bring your jury in. >> reporter: a clear indicator, prosecutors said, the mother of 2-year-old caylee planned her daughter's death. >> this murder was premeditated. and the defendant is guilty. >> reporter: a main reason the state wanted the death penalty, chloroform. but just where did the idea of chloroform originate? authorities say they found evidence of online searches for chloroform locked in the memory of a computer in the home casey shared with her parents. >> entry number 3, the www.sizespot.com chemistry/chloroform, how many times was that site visited? >> according to the history, 84 times. >> reporter: the revelation so damning it's believed to have motivated casey's mother cindy, fearing for her daughter's life, to shock the court and suddenly admit she was the one doing the searches. >> and i started looking up chloroform -- i mean chlorophyll, and then that prompted me to look up chloroform. >> then monday it was revealed the extensive computer searches for chloroform were based on inaccurate data. in an online statement, john bradley, the prosecution's man on the stand who had cited the significant number of searches, said ten days after his testimony he went back and revisited the data and retooled his software. and found a mistake. there weren't 84 searches for chloroform, only one. since the trial was still going on, bradley said he immediately notified the prosecution of the error. in a statement on his web site he said, "i even offered to fly down there overnight at my own expense to set the record straight since the fate of a woman's life could lay in this critical piece of information." bradley told the "new york times" his revelations were never presented to the jury, and the record was never corrected. leading defense attorney cheney mason to fire back to the times, "if in fact this is true and the prosecution concealed this new information, it is more than shame on them. it is outrageous". but the prosecutor's office said it did tell the defense of the error. it also says a second software program used to analyze the anthony computer showed only one chloroform search as well. >> showing the size spot one time. >> reporter: in a statement, state attorney lawson lamar said, "court records show that defense was completely aware of the issues, utilizing these facts at trial". in fact, defense attorney jose baez did bring up the >> there are no such searches of being 84 times for chloroform. >> reporter: mysteriously wednesday, bradley stopped talking, declining our request for an interview. instead, issuing another statement, this time through his attorneys. it read, "mr. bradley denies making any comments that either determined and/or implied any wrongdoing on behalf of the prosecutor's office". the debate may be pointless, given the jury's verdict that casey anthony was not guilty of murder. but it's another unanswered question in a trial that had many. martin savidge, cnn. >> and plenty to talk about now with me, defense attorney mark gerragos and san francisco prosecuting attorney paul henderson. welcome to both of you. this is a fascinating revelation. mark, had casey anthony been convicted this issue with the chloroform searches would have been grounds for a new trial. i mean, is that right? >> it certainly would have led off a motion for a new trial, this and all the other junk sky athens the prosecution presented. i think this just kind of points out to the fact that the jury got it right and this just supports everything that i kind of suspected from the get go. this idea that somehow there were 84 searches of this or that just wreaked at the time of somebody who just didn't know what they were doing when they were looking at the searches. >> would you have said, as a defense lawyer, what would you have done in the situation? if it just smacked of not making sense? >> i've had this precise case twice over with murder cases where somebody has gotten up and purported to be an expert and then take an look at the search. and it's really just the fact that they can't read it properly. >> you know, paul, needless to say a lot of people are paying attention to this and i think a lot of people paid attention to that particular part of this case. according to the post that bradley put on his web site, he said he thought the 84 searches seemed odd but didn't bring it up because he didn't have details about the investigation and didn't investigate the evidence himself. could he, should he have brought these misgivings up at the time? >> yeah, absolutely. i mean, the police and the prosecuting attorney were using the information from his program. i mean, that's how they got it. and obviously, that seemed very relevant for casey if she had searched chloroform 84 times, that means something. that's why they were trying to introduce this evidence in the first place. >> i mean, it seems like everyone found this particular fact odd. i mean, is this one of those situations where the prosecution just said, you know what, it's odd but let's throw it out there and see if it sticks? >> it might not be odd if that was what happened. so if someone searches for chloroform 84 times, that does mean something. >> i've got a totally different view of that. yes, the prosecutor would want to get it in but only because the prosecutor suspended all common sense because they're so invested in their theory. anybody who had any kind of experience with the computer or computer searches should have known and bells and whistles should have gone off telling you that there's no way somebody was going to do 84 searches within that time period. >> paul, let me ask you a question as admittedly a non-legal person. what's your take on expert testimony from paid witnesses in general? i mean, is this a necessity for certain cases? and should jurors view the testimony of someone who's getting paid any differently than they would have a witness who isn't receiving money for their testimony? >> oh, believe me. every time you have a trial and you have the witnesses on there that's always part of the line of questioning as to how much you're getting paid and how many times you've testified either for the prosecution or for the defense. and we trust jurors to understand that and evaluate if there's a bias or if there's truthfulness in the testimony. but in a case like this where you have so little evidence, i think you're always -- you can always expect as a juror that both sides are going to be throwing experts at you one way or the other trying to influence your decision and trying to give you a lens at looking at what other evidence exists in the case in association with the incident to try and get you to a conclusion that either side is going to fight about. >> does it come out in the wash, mark gerragos? both the defense and prosecution do this? >> i call it the knock out rule. you put on your expert, they put on their expert. the jury disregards both. >> the interesting thing is how the both sides argue about the experts afterwards. because that's where you really see what the experts did. you wait for the attorneys, both for the prosecution and the defense, to summarize both their experts' testimony and the other side's testimony. that's when the decisions get made. >> well, just a fascinating revelation. weeks after the fact, though. i appreciate it, both mark gerragos, paul henlder son. thanks so much. >> thanks for having us. up next, another notorious criminal. the man who claimed to be clark rockefeller, a member of an elite american family. that was a life. and there were many, many more. now he's accused of murder. and later, the killings of tupac shakur and biggie smalls and the street code against cooperating with police, even to get justice for a friend. crime fighter john walsh weighs in. >> somebody helped orchestrate that b.s. gangster crap. and they've literally gotten away with murder. i do believe that somebody is going to man up at some point in their life and say, this isn't right. biggie had friends, relatives. he had a mother, people that loved him. tupac had lots of people, he has surviving children. in here, the planned combination of at&t and t-mobile would deliver our next generation mobile broadband experience to 55 million more americans, many in small towns and rural communities, giving them a new choice. we'll deliver better service, with thousands of new cell sites... for greater access to all the things you want, whenever you want them. it's the at&t network... and what's possible in here is almost impossible to say. -why? 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[ blower whirring ] [blower stops] the safety was off. out there with a better way. now, that's progressive. for years he went by the name clark rockefeller him. pretended to be a member of the wealthy american family. his true identity came to light when he was charged with kidnaping his own daughter. that's when police say he uncovered a web of lies that went back decades. now he's accused of killing a neighbor more than 25 years ago. here's tom foreman. >> reporter: they say pictures don't lie, but this one did. and this one. and maybe thousands more of the man called clark rockefeller. because investigators believe he was almost never whom he claimed to be. and in his rocket rise to the top of society, they think he committed murder. >> well, he's a man who built his life on fiction. >> reporter: mark seal wrote "the man in the rockefeller suit". the astonishing rise and spectacular fall of a serial imposter. >> he didn't just do this with one name or one persona. he did it repeatedly, time after time after time after time. in increasing graniosity. increasingly intelligent, learned, successful circles. >> reporter: his story starts long ago in 1978 when under his real name, christian gerhartschreiter, a working class german teen, he came to america and found the life he wanted on tv. >> good morning, mr. and mrs. howell. beautiful day. >> ideal flying weather. >> if you remember the television show "gilligan's island". he started watching that. and apparently began to emulate the excentric east coast millionaire thur ton howell iii, mimicking his speech and his accent and his way of life in a way. >> reporter: police say that started a decades-long odyssey of moving and new identities. in wisconsin he was film student chris gerhart, dreaming of fame and rooting for ronald reagan. in california he said he was christopher