Mental health experts say the soldier suspected of murdering Afghanistan civilians could have post-traumatic stress disorder, or PTSD.
Harvard University psychiatrist Dr. Roger Pitman says that a report that the suspect saw a fellow soldier's leg blown off a day before the killings raises the possibility that this event triggered a psychological crisis. The injury or death of a buddy can create what he calls "a blind rage."
The experts have no direct knowledge of the soldier's case but say that PTSD is common after injuries like the concussion and loss of part of a foot that the soldier reportedly suffered.
The information about the soldier's injuries came from a Seattle lawyer representing him.