Michael Neitzel , 21 , begged Officer Peterson to stop shooting , AG said . AG : He eventually stopped in Argonne , Wisconsin , where he spoke to friends and confessed , Van Hollen said . After Peterson fired second time , Neitzel dropped to floor and did n't move . Peterson was shot three times in the chest ; once in bicep , AG said . Peterson opened fire on a party of young people Sunday , killing six .
Michael Neitzel , 21 , begged Officer Peterson to stop shooting , AG said . AG : After Peterson fired second time , Neitzel dropped to floor and did n't move . Peterson was shot three times in the chest ; once in bicep , AG said . Peterson opened fire on a party of young people Sunday , killing six .