Federal authorities have asked to question the wife of suspected Boston bomber Tamerlan Tsarnaev, according to her lawyer. Katherine Russell Tsarnaev found out that her husband was a suspect in the Boston Marathon bombing - that took place on April 15 - by seeing it on TV, Amato DeLuca told The Associated Press. He added details about days after the bombing, saying Tamerlan "was home" when he wife left for work on the last day she said she saw him alive.