After a review of both clips, a couple points.
1. You very obviously were going to shoot that cop when he came in. You were getting chased and hid behind a door with a shotgun out and then even ignored the clown when he came in lol. This is starting a Violent Confrontation with police.
2. Whether or not the clown had attempted to kill you is irrelevant, dont pull a gun on police just because you think they're wrong.
3. Bullets taking his own PK ticket is fine, this is very obviously a PK, and there weren't even any other staff on at the time, and bullets reached out to another staff member for a second opinion just to make sure.