It 's Matthew , ' `` he said . NEW : He copied Columbine shooter 's writings in Web postings . Matthew Murray , who killed four people , Sunday at missionary camp in 2002 . He was left off mission trip for health reasons , center official says . He played Marilyn Manson , Jurassic Park , at concert , co - worker says .
NEW : He copied Columbine shooter 's writings in Web postings . Matthew Murray , who killed four people , Sunday at missionary camp in 2002 . He was left off mission trip for health reasons , center official says . He played Marilyn Manson , Jurassic Park , at concert , co - worker says .