Tsarnaevs' Mom: Dzhokhar Says They're Innocent

The Tsarnaev brothers' mother is providing more details of her first conversation with Dzhokhar post-arrest. He told his parents that he and Tamerlan weren't involved in the Boston bombings, Zubeidat Tsarnaeva notes. Though he said his health was improving—he's been able to walk again—and he has an excellent doctor, "He didn't hold back his emotions ... as if he were screaming to the whole world: What is this? What's happening?" Tsarnaeva tells the AP.

"I could just feel that he was being driven crazy by the unfairness that happened to us, that they killed our innocent Tamerlan." During the interview at the Tsarnaev parents' new apartment in Dagestan, Tsarnaeva played reporters videos on YouTube that she claimed proved her children's innocence, though the AP couldn't authenticate the clips. Meanwhile, CNN has obtained security footage of the Tsarnaev brothers working out at a mixed martial arts center three days before the bombings. (More Dzhokhar Tsarnaev stories.)