Esteban Santiago, the man accused of killing seven and wounding six during a Jan. 6 shooting spree at Fort Lauderdale International Airport, apparently had a history of mental problems that can be traced to his service in Iraq. The Associated Press reported that Santiago, showed serious signs of mental-health issues when came home from a 2010 deployment with the Puerto Rico National Guard. He had been undergoing psychological treatment, and at one point visited an FBI office in Anchorage, Alaska, and told agents there that the Islamic State was controlling his mind. If convicted of the killings, Santiago could face the death penalty.