When I was in the Navy I was the supervisor & couldn't find one of the guys that was supposed to be helping. I ran things like I thought the team should be run so I went looking for him.
When I found him he was sitting cross-legged on the floor behind a piece of equipment exercising his elbow. When I walked up and looked over the equipment he was caught meat in hand. I told him everyone else was working and he should be part of it and make up for slacking. I told him to put it away, clean up his shit and get back to work, and never sneak off during working hours or it would be brought up again.