Marine Corps identifies Sgt Eusebio Lopez as shooter in Thursday night murder-suicide at Quantico. had deployed to Iraq and Afghanistan.
— Dan Lamothe (@DanLamothe) March 24, 2013
Some more here:
Lopez was an instructor at officer candidates school, known for its grueling 10-week program that evaluates Marines on physical stamina, intelligence and leadership. The candidates must complete obstacle courses, hikes of up to 12 miles in full combat gear and take classes on navigation and tactics that help them in the field, according to the school's website.