Related:

2 May 2013, CNN Newsroom: FBI Looks At Wife's Cell Phone Call (excerpt)

2 May 2013, YouTube: CNN: Source: FBI looking at wife's phone call
http://transcripts.cnn.com/TRANSCRIPTS/1305/01/ebo.01.html

Sources: Widow Spoke To Bomb Suspect After FBI Released Picture

May 1, 2013

Excerpt:

[...]

ERIN BURNETT, CNN HOST: Tim, is there any way, obviously, there is a voice mail they can try to get the phone companies to give that up at this point. It's not a voice mail. It's just a conversation. There's no way they actually can find out what happened, right, unless she tells them?

TIM CLEMENTE, FORMER COUNTERTERRORISM AGENT, FBI: No, there is a way. We certainly have ways in national security investigations to find out exactly what was said in that conversation. It's not necessarily something that the FBI is going to want to present in court, but it may help lead the investigation and/or lead to questioning of her. We certainly can find that out.

BURNETT: So they can actually get that? People are saying, look, that is incredible.

CLEMENTE: No, welcome to America. All of that stuff is being captured as we speak whether we know it or like it or not.

[...]