A murder and a bystander were teaming on murder, hanging around with eachother, and possibly helping eachother. The bystander would find players and tell the murderer about them, tell their location and kill them. They could possibly know eachother as well. By what I saw the bystander got a gun, and when three seconds would pass they would throw/shoot their weapon, ( or Russian Rulette [idk how to spell it ] ). Also backing up my theory on how they might know eachother is how the murderer whould show his knife if front of the bystander, and the bystander doesn't get alarmed. You can see their usernames in the screenshots I took. I know they might not be very good but it's all I got.