You call in the police when any criminal act has been commited, or, when the police are available (e.g. on the ground), to contain a problematic situation. In flight, it is the Captain who has the authority to contain a problematic situation. This is usually by delegation, and is far better delegated to the Cabin Crew. In my view, your Captain's decision to send you to a possibly dangerous in-flight situation was extremely poorly judged.
Reading between the lines of your post, a criminal act did occur, i.e. verbal abuse of the cabin crew. In MOST countries, verbal abuse constitutes Assault, which IS a criminal act.
Regards,
Old Smokey