People tend to forget what RDM means so here you go:

2.1 Random Death Match - In order to kill a player, you must have a role-play-valid reason to do so. Crossfire is not an excuse to shoot someone around the area of where you're shooting / raiding .

As long as your reason is valid its not rdm. You can even see yourself scrolling to the arrest batton but either way you followed him for sever seconds making him feel threatened.