Josiah Thomas, 11, (L) and his sister Maranatha, 7, hold signs in front of the Fort Hood Army Post in Fort Hood, Texas November 7, 2009. Investigators searched on Friday for the motive behind a mass shooting at the sprawling U.S. Army base in Texas, in which an Army psychiatrist trained to treat war wounded is suspected of killing 13 people. The suspected gunman, Major Nidal Malik Hasan, was shot four times by police, a base spokesman said. He was unconscious but in stable condition. REUTERS/Jessica Rinaldi (UNITED STATES MILITARY CRIME LAW CONFLICT)AP – One of two police officers who confronted the alleged Fort Hood killer says he shot Maj. Nidal Malik Hasan before kicking the man’s weapon away, handcuffing him and ending the nation’s worst killing spree on a military base.