Authorities defend police response ; 13 funerals held Friday . Guns found at scene registered to suspected shooter , authorities say . Suspect was taking English classes , also upset at losing job , police say . the American Civic Association kills two people , then self at New York , New York , immigration center .
Authorities defend police response ; two funerals held Sunday . Guns found at scene registered to suspected shooter , authorities say . Suspect was taking English classes , also upset at losing job , police say . Gunman kills 13 people , then self at Binghamton , New York , immigration center .