Boston bombing suspect is walking, mother says

MAKHACHKALA, Russia (AP) — The remaining suspect in the Boston Marathon bombings has recovered enough to walk and assured his parents in a phone conversation that he and his slain brother were innocent, their mother told The Associated Press today.

Meanwhile, the father of a Chechen immigrant killed in Florida while being interrogated by the FBI about his ties to the slain brother maintained that the U.S. agents killed his son "execution-style."

Dzhokhar Tsarnaev, 19, walked without a wheelchair to speak to his mother last week for the first and only phone conversation they have had since he has been in custody, Zubeidat Tsarnaeva told the AP.

In a rare glimpse at Dzhokhar Tsarnaev's state of mind, he told her he was getting better and that he had a very good doctor, but was struggling to understand what happened, she said.

"He didn't hold back his emotions either, as if he were screaming to the whole world: What is this? What's happening?," she said.

The April 15 bombings killed three people and wounded more than 260. Elder brother, 26-year-old Tamerlan Tsarnaev, was killed in a shootout with police, and Dzhokhar remains in a prison hospital after being badly wounded.