[JURIST] A US military court on Thursday convicted an army squad commander of three counts of premeditated murder for leading a "kill team" in Afghanistan that targeted unarmed civilians and collected body parts as war trophies. While three of the four defendants pleaded guilty and received reduced sentences, Sgt. Calvin Gibbs [NYT profile], 26, was given a life sentence for 15 convictions including murder, assault and conspiracy connected to the killing of three men not long after he took…