. >> reporter: rockdale county district attorney richard reed. >> we need to look at joe carter. especially since nikki and joe had been in an argument. they were breaking up. >> reporter: that's a dangerous time in a relationship. >> it can be a dangerous time in a relationship. >> reporter: it wasn't hard to track joe down. he was at the barber shop where he worked. >> it was around closing time. we was ready to pack up and get out of there, and they approached me and my friends. then they basically said that she passed away. i mean, she's dead. i was shocked. i was just in shock. >> reporter: how did he react when you came to see him? >> he immediately started weeping. >> reporter: he didn't know about the -- or claimed not to know? >> he claimed not to know. >> reporter: but reactions don't always tell the real story. >> they was basically asking about our relationship. when the last time i seen her. i started to realize i was a suspect. >> reporter: detective moon did what any good detective would do. he looked for the sort of marks nikki might have left on her assailant's b

richard reed was interested when, one day, defense attorneys suggested they wanted to make a deal. >> my response is it's great to hear it from you, but i want to hear it from them. and so i'd like to talk to your clients. i'd like to ask them questions. >> reporter: and that's how d.a. reed met the 19-year-old jazz and taz and heard them confess they did kill their mother. but was it a confession, really? in fact, said the twins, it wasn't their fault. she started it. >> she's starts cursing and stuff. i think she was mad about us being late. >> reporter: that morning, they said, nikki was furious that they were late for school and picked up a pot in the kitchen, they said, and swung it at them. >> she still calling us whores and sluts and everything like that and stupid and everything like that and she threatened us. i don't know. we're all going to die today. >> reporter: that's jazz. and then taz picked up the story. >> all right, so you took the pot away from your mom. what happened then? >> she kind of just like charged forward, not at me though, at jazz. >> reporter: now, nikki

way back in the beginning, 15 years ago, richard reed, the shoe bomber, the man who made it so that wee to take our shoes off when we get on to a plane, that individual actually converted to islam in a british prison and walked deeper, deeper down the path of jihadi radicalization as a result of that. so, if these reports are confirmed, that this man has some background in non-terrorist criminal activity, then that's something that we have definitely seen before. >> so, if that's happening in the prison system, how do you prevent that? >> well, we actually have here in america and in europe as well undercover agents and also asset sources that work for the penal systems and the federal law enforcement, and that's really the best way. counterterrorism is ultimately a human intelligence challenge. it's great to have satellites and surveillance equipment and all kinds of other materials of a technical nature, but what has to really occur is the individual has to be identified prior to them planning the attack and executing it. and the best way to do that is to penetrate the communities wh