Sounds to me like he was P.O.'d about being asked to leave private property.
Sounds to me like a wanton killer!
It's all the military's fault for training him. Just like the 38-year old convicted serial rapist/attempted murderer who hanged himself the other day in Tucson. Today his mother is claiming he was a good boy growing up, but his war experience changed him.
According to sources on other threads, the perp was asked to leave the property on two previous occasions. There are thousands of acres of public land to hunt in the adjoining land. This case should get more interesting.