A law enforcement source and police dispatch identified Cain Clark as a suspect in a shooting at the Islamic Center of San Diego, an attack authorities are investigating as a hate crime. People who knew the 17-year-old told CNN they were in shock. Another 18-year-old suspect has yet to be identified. Three people were killed, and the two suspects were later found dead.

Girl, 17, identified as victim of Mall of Louisiana shooting; Boy charged with murder