Of course, we know that the red shirt exists to die!
However, reading police procedural novels I notice the police version. It is the poor schmucks in the patrol car that are sent to the potential victim of the Hannibal Lecter level super psychopath killer. In the book I just read, the super killer cleverly escapes from the court room (pulls the fire alarm) and runs away. A groupie gives him some escape crap as he runs out.
Anyway, it is clear that he is going to seek revenge on some people. So the FBI is in hot pursuit. Do they call the local office to get the victims and just move them (no - let's wait till our Behavioral team gets into town). Does the local law get the victim and move them - NO. They say they will drive by every once in awhile. Or they will park a car with some unattentive Barney Fife's outside the house.
The local law is DEAD - through some clever ploy like walking up to them with a donut.
The behavioral team arrives in the nick of time. Of course, the first agents in are dispatched, leaving our super agent to engage in a life and death struggle (can't shoot the dude as the Glock 19m was dropped in the mud) and won't fire.
BTW, the victim stays put like a tethered goat and falls for a ploy to get into the house. This time the super villain said HE was the behavioral team agents.
The donut eating red shirt / policer in front of the car - it's in a lot of books. If you were going to protect something, is that the way to do? I'd beam them up.