It was a pretty gruesome scene . '' NEW : ` ` The worst scene I 've ever seen , '' Maj agent testifies . Agent recounts the `` chaotic '' scene of the 2009 killings at Fort Hood . Army psychiatrist FBI . Nidal Hasan is charged with killing 32 people , wounding 13 . FBI has admitted he was the gunman ; he 's representing himself .
NEW : `` The worst scene I 've ever seen , '' Maj agent testifies . Agent recounts the `` chaotic '' scene of the 2009 killings at Fort Hood . Army psychiatrist FBI . Nidal Hasan is charged with killing 32 people , wounding 13 . FBI has admitted he was the gunman ; he 's representing himself .