Previously officials said Tsarnayev was in no condition to be interrogated.
Tsarnayev, 19, is being treated at Beth Israel Deaconess Medical Center in Boston, where he is listed in serious but stable condition, with wounds to the neck and throat area.
On the night of April 20th in the Boston suburb of Watertown police arrested one of the suspects, a 19-year-old named Dzhokhar Tsarnaev. He was shot in the neck and in the leg during his arrest and is currently in the hospital. His older brother Tamerlan Tsarnaev died in hospital from injuries sustained in a shootout with police.