Jimmy and his friends confront Dave. Jimmy admits to Dave that he killed "Just Ray" for implicating Jimmy which resulted in his imprisonment. Dave reveals to Jimmy that he did kill someone that night, but it was not Katie; he beat a child molester to death after finding him with a child prostitute. Jimmy does not believe Dave and pulls out a knife, but promises to let him live if he confesses to Katie's murder. However, when Dave admits to killing Katie, Jimmy kills him and disposes of his body in the adjacent Mystic River.