Who killed Katie in Mystic River and why?

This, along with the suspicious 911 call about Katie’s car, leads Sean to discover that Just Ray’s mute son, Silent Ray, and his friend, John O’Shea, killed Katie. The crime started as a silly street prank that went off the rails when Katie started screaming and they accidentally shot her.

Who was the killer in Mystic River?

Resolution: Sean tells Jimmy that Silent Ray was really the killer. Sean realizes Jimmy must have killed Dave. Meanwhile, Sean’s estranged wife finally speaks to him. Final “closing characteristic moment” for all the characters at the parade in the final scene.

Who killed Sean’s daughter in Mystic River?

Sean and Whitey, having connected the two boys to the murder, arrive and disarm and arrest John and Ray. The next morning, Sean tells Jimmy that John and “Silent Ray” confessed to killing Katie as part of a prank gone wrong.

Who was molested in Mystic River?

Plot Summary (4) In the summer of 1975 in a neighborhood in Boston, three kids- Dave Boyle and his two friends, Jimmy Markum and Sean Devine- are playing on the sidewalk when Dave gets abducted by two men and endures days of sexual abuse. Eventually Dave escapes, but is traumatized throughout adulthood.