Despite evidence that suggests Spc. Ivan Lopez had an argument before going on a shooting rampage, investigators may never determine what compelled the Fort Hood soldier to kill three soldiers and wound 16 others before taking his own life, the Associated Press reports. Lt. Gen. Mark Milley, Fort Hood commander, said that an “escalating argument” precipitated the assault. He declined to discuss the cause of the argument but said investigators believe Lopez made no effort to target specific soldiers — even though at least one of the soldiers shot was involved in the dispute.
Milley would not say whether those involved were among the dead or wounded, or how many shooting victims had been a part of the argument. “There was no premeditated targeting of an individual,” he said. However, the military has not established a “concrete motive” for Lopez’s rampage, said Chris Grey, a spokesman for the Army’s Criminal Investigation Command based in Quantico, Va. “The possibility does exist that we may never know why the alleged shooter did what he did.” Investigators now believe Lopez’s mental condition was not the “direct precipitating factor” in the shooting,