Yes. Thank you. Some of it has already been said.
I think when the police appear at a home and the perpetrator, or the man, is impeding the woman from speaking, perhaps wanting to be the interpreter or saying things like, “Well, she doesn't really understand English very well”, or “She's sick and she's not doing well”, and is clearly trying to keep the police from speaking to the person, that is an indication. The evidence of coercion or control will be assessed later. Once that victim is in safety, and once charges have been laid through the investigation, it is very easy to find out.
Some of my colleagues already mentioned the control, the extreme control, the surveillance of the person even at work. The person goes to work and their abusive partner is calling, questioning colleagues, picking the person up at the door, and not allowing the person to go to family members or to speak to friends. They're controlling every movement. It is not difficult to assess coercive control.
I think on the question the chief was trying to answer, it may be difficult, when you attend a call, to ascertain whether there is coercive control, but it is not difficult when you observe and see what's happening. Is this person speaking freely or is there an appearance of fear?