jeff bouman awakens from a double lower leg amputation and asks for a pen.e scribbles these words. bag, saw the guy, looked right at me. when fbi agents interview him, he reportedly describes a man with a black cap and sunglasses dropping a backpack on the ground and walking away just before it explodes. bouman's tip helps investigators zero in on who else to look for in all the images. >> they did try to use facial recognition software. once they had this picture but to make it really work you have to have a clear front-on picture of someone to match against databases. >> reporter: without a positive i.d., the fbi is faced with a pivotal decision. should it release the photos and solicit the help of the public. >> we don't know who they are. we don't know if they have other attacks planned. every hour we wait they're potentially getting further away. >> reporter: it's a call that could backfire. >> if you publicize their pictures, it gives them a pretty clear signal that you know at least what they look like and it's going to encourage them to flee and flee

of the numerous people now regarded as a hero of the boston marathon bombings is speaking out, jeff bouman easter fiing ordeal was captured in this now famous photograph showing him in a wheelchair moments after receiving massive injuries from the explosion. he lost both his legs and despite injuries he was able to identify one of the suspected bombers. this morning bauman spoke to weel boston radio station saying his injuries hurt every day. and he also describes the chilling moment when he was standing next to one of the suspected bombers. >> i was with my girlfriend's roommates and having a great time, you know. we were watching the runners. everyone was having a great time. and just that one guy, you know, he didn't look like he was having a good time. he was right next to me at that point. and he had a bag. and he had his glasses. he had kind of like a sweatshirt type of deal. and it was warm out. it was just an odd guy. it just struck me as odd. that's what i remember and then next thing you know i hear fireworks and i'm on the ground, you know? >> i misspoke, weei the boston radio s

jeff bouman, who had come to watch his girlfriend race writes, bag, saw the guy, looked right at me,a bloomberg interview with his brother. words that help investigators narrow down the suspects as they pore through hours of security camera footage and hundreds of spectators' photos. he saw the older tsarnaev place a backpack right next to him close to the finish line. he was wearing a baseball hat. he's found on video footage. behind him another young man, investigators zero in. >> today we are listing the public's help to identify the two suspects. after a very detailed analysis of photo, video and other evidence, we are releasing photos of these two suspects. they are identified as suspect one and suspect two. >> reporter: april 18th, just three days after the bombing, authorities give us our first glimpse of the suspected bombers. brothers, tamerlan and dzhokhar tsarnaev. how did they isolate them? chilling details from the fbi affidavit. at 2:38 p.m. the day of the marathon a security camera picks up the two suspects turning east on boylston from gloucester street. both are carr

back in boston, victim jeff bouman told a local radio station he noticed the elder brother just before>> it struck me odd. that's what i remember of him. and then the next thing you know, you hear fireworks and i'm on the ground. >> reporter: also new gripping details on the carjacking victim known only as danny, who spent a harrowing 90 minutes with the suspects before escaping and alerting police. he told the fbi and james allen fox he heard tamerlan confess to shooting m.i.t. officer sean collier. >> i juhe said i just killed a in cambridge. >> reporter: we are told that tsarnaev's parents have traveled to check knhnya in the last 24 8 hours. meanwhile, stores reopening this morning. people paying tribute at a memorial and 30 victims remain in the hospital. >> all right, michelle franzen in boston for us this morning. thanks very much. >>> congress has passed a bill to send air traffic controllers back to work after a week of furloughs delayed thousands of flights across the country. critics, though, say this is just another example of dysfunction in washington. tom costello is at r