A police detective in London is asked by her boss to listen to a tape of an emergency call concerning an allegation of domestic violence. It’s more a formality than anything; the caller refused to give her name or any other identifying details. But she does let slip one bit of information that catches the detective’s attention: Her abusive boyfriend told her he killed his previous girlfriend years ago — and now another man is serving a prison sentence for the crime. Then she screams and the line goes dead. That call will be the undoing of several cops in the Apple TV+ police procedural “Crimin…