In this case, I was the team killer (completely by accident) I was playing R6 Siege casually on a Terrorist Hunt, on Defense. I enjoy playing Doc as well, and he is my favorite character. For those who don't know, he has a syringe gun when can revive downed teammates instantly at range. Close to the end of one round, a teammate went down. Me, being the enthusiastic teammate I am, tried to get him up as quickly as possible. So I took out my revolver and shot him in the face. I was very confused at first, before I realized that I had hit the wrong button, and had executed a teammate instead of reviving.