<P> The next morning , Sean tells Jimmy the police have Katie 's murderers -- who have confessed . She was killed by Brendan 's brother , `` Silent Ray '' Harris , and his friend John O'Shea in a violent prank gone wrong : The kids got hold of Just Ray 's gun and saw a car coming which happened to be Katie 's . John aimed the gun just to scare her but the gun went off by accident . The car veered onto the curb and Katie got out and ran into the park . Silent Ray and John pursued her so she would n't tell anyone . The beating Katie received was from Silent Ray , who had a hockey stick . Once she was beaten , John shot her again , killing her . Sean asks Jimmy if he has seen Dave , because he is wanted for questioning in another case , the murder of a known child molester . A distraught Jimmy thanks Sean for finding his daughter 's killers , but says , `` if only you had been a little faster . '' Sean asks Jimmy if he 's going to `` send Celeste Boyle $500 a month too ? '' </P>
<P> The next morning , Sean tells Jimmy the police have Katie 's murderers -- who have confessed . She was killed by Brendan 's brother , `` Silent Ray '' Harris , and his friend John O'Shea in a violent prank gone wrong : The kids got hold of Just Ray 's gun and saw a car coming which happened to be Katie 's . John aimed the gun just to scare her but the gun went off by accident . The car veered onto the curb and Katie got out and ran into the park . Silent Ray and John pursued her so she would n't tell anyone . The beating Katie received was from Silent Ray , who had a hockey stick . Once she was beaten , John shot her again , killing her . Sean asks Jimmy if he has seen Dave , because he is wanted for questioning in another case , the murder of a known child molester . A distraught Jimmy thanks Sean for finding his daughter 's killers , but says , `` if only you had been a little faster . '' Sean asks Jimmy if he 's going to `` send Celeste Boyle $500 a month too ? '' </P>
who killed the girl in mystic river movie
who killed the girl in mystic river movie
his friend John O'Shea Brendan 's brother , `` Silent Ray '' Harris
his friend John O'Shea Brendan 's brother , `` Silent Ray '' Harris