"A man with a deadly weapon and the power to incarcerate you and make your life infinitely miserable says to you "You better stop runnin your mouth or the other officer will find a reason to lock you up tonight," and you claim that doesn't constitute a threat?"
Your comments are loaded. The man with the deadly weapon and ability to make your life more miserable is an officer of the law - you do believe in laws I hope - sworn to protect citizens.
The conversation you cite is officer #4 speculating on officer #1. It is clearly not a threat as he is not himself threatening. Also note that jailing one is not a threat either, but something that happens in a legal way many times over every day and night.
HUH?????