BERMAN: All right, we have breaking news. I want to show you live pictures of Italian authorities laying out their case against two American teenagers. They're accused of stabbing to death a police officer. CNN's Barbie Nadeau live in Rome with the breaking details, as this goes on before our eyes, Barbie.</s>BARBIE NADEAU, CNN CONTRIBUTOR: That's right. And we've got some interesting details that are going to clear up some aspects of this case and add confusion to some others. One of them, the police were very, very clear to say is that young suspect in that picture of him blindfolded, that blindfolding episode happened before the interrogation. That was not part of the interrogation. The police repeated that over and over and over. The other thing, and this is really the breaking news out of this, and adds -- I think clarifies a lot of the confusion. The police say they had witnessed the two Americans purchase cocaine, or purchase what eventually became known to be cocaine, so they were trailing the Americans long before this happened. That is going to be vital in this investigation because up until now it was unclear how the undercover police officers got involved. But they had been trailing the Americans, and that's interesting. The Americans, the Italian police were very quick to point out, were wearing hoodies during the whole situation. And also another thing that we've learned that's interesting is that police officers were apparently armed. But it is against Italian regulation to shoot at suspects while they are escaping the crime. And by the time they had -- the one police officer with 11 wounds is on the ground, by the time the other one understood what was going on, the suspects were running away, and it would have been against Italian police regulation to shoot at them. Alisyn.</s>CAMEROTA: Oh, my gosh. Just crazy developments there. Barbie, thank you very much for all of that reporting. All right, back here in Detroit, we are just hours away from the big debate. NEW DAY continues right now.</s>UNIDENTIFIED FEMALE: The stage is
Italian Authorities Lay out Murder Case Against U.S. Teens.