When your talking about this type of killing all possibilities whould be explored. Until he’s proven not to have any Mooselip connections, he is a terrorist. Too military for a random killing.
Pray for W and Va Tech
Well, if there aren't any connections according to the authorities, I'm sure a Threat Matrixer will come up with info showing that his roomate's cousin's boyfriend's uncle has an accountant who lives in Michigan who walked within 500 feet of a Mosque once.
Do not know anything about his religious convictions, but if he turns out to be a foreigner, I think the acceptable operative phrase nowadays is 'insurgent'.