Anything is possible, but there's nothing to support anything more than a heated row.
I had an ex that lost it once, she was pissed & totally off her head, I wasn't, and to this day I have no idea why she throw a wine glass at me & stormed off into the kitchen & started to smash plates. I grabbed hold of her in an attempt to stop her & the damage she was causing, she screamed at me to get the fuck off her. I did, she fucked-off to bed in tears, I decided to sleep on the sofa, & next day she couldn't explain what had happened & just apologised, these things happen.
Carrie had a shit day, what with the news of John Worboys bringing up horrific memories, BJ comes in on a high, both get a bit drunk, the twat ruins her sofa with red wine, she understandably loses it with him. So, at what point did BJ perhaps grab hold of her to clam her down? When she grabbed his laptop? When she started smashing plates?
I've no idea, but what I do know is someone pissed-up in a heated row, male or female, screaming 'get off me' is not evidence of anything muchl. The fact the police were only there for just a few minutes, would indicate they had no concerns. She has made no complaint.