SAN FRANCISCO The family of a woman allegedly killed by an immigrant whod been repeatedly deported sued the San Francisco sheriffs office and federal authorities Tuesday over an alleged series of errors with tragic consequences.

Kate Steinle, 32, died on July 1 when she was struck by a single bullet while strolling with her father and a friend on a pier overlooking the San Francisco Bay. The man who allegedly pulled the trigger was Juan Francisco Lopez-Sanchez. Hes pleaded not guilty , but said in a television interview that he found the gun beneath a bench and that it accidentally went off when he picked it up.