"Lopez' mother, Carmen, an emergency room nurse in their hometown, died of a heart attack in November. A month earlier, Lopez' grandfather had died in Guayanilla."
"Lopez attended the funeral but was disappointed that it took about five days for his 24-hour leave to be approved by the military."
"Before Wednesday's shooting, Lopez stopped at the post's personnel office to pick up a leave form, according to the sister of one of the soldiers injured in the attack. The soldier was told he would have to come back later, Otis said.
"And apparently I guess he didn't want to hear that, so he came back and just opened fire, " Otis said."
Certainly no excuse for what he did but this kinda stuff is pretty standard for the army and their is no reason for it.