(CNN, April 6, 2014)- Spc. Ivan Lopez vented about a range of subjects on Facebook before his shooting rampage at Fort Hood in Texas — his outrage at Adam Lanza’s mass school shooting in Connecticut, the overpowering fear during an insurgent attack in Iraq, all-consuming hatred after getting “robbed.”
Lopez took his own .45-caliber handgun onto the sprawling post Wednesday and killed three people and wounded 16 more before taking his own life, according to authorities.
They are trying to piece together what in his background and psychiatric treatment could have triggered a new round of bloodshed at the same Killeen post where an officer killed 13 people in 2009.
A 34-year-old Iraq war veteran with a history of depression and anxiety, Lopez was being evaluated for post-traumatic stress disorder before his shooting spree. He arrived at the post in February after being transferred from Fort Bliss in El Paso.
His Facebook posts, which were obtained from a Lopez family friend, appeared under the account name of “Ivan Slipknot,” a reference to a heavy metal band. A family spokesman confirmed the account belonged to Lopez.
t is unclear whether his posts might help explain his mental state or a possible motive in the shootings. Authorities have said the motive is not known.
“Given that the alleged shooter is deceased, the possibility does exist that we may never know exactly why the alleged shooter did what he did,” said Chris Grey, a spokesman for the U.S. Army Criminal Investigation Command.