From New York Times:

He thought he was getting used to suicides in his old infantry unit, but the latest one had hit him like a brick: Joshua Markel, a mentor from his fire team, who had seemed unshakable. In Afghanistan, Corporal Markel volunteered for extra patrols and joked during firefights. Back home Mr. Markel appeared solid: a job with a sheriff’s office, a new truck, a wife and time to hunt deer with his father. But that week, while watching football on TV with friends, he had wordlessly gone into his room, picked up a pistol and killed himself. He was 25.