Might need to post this in AIBU for more traffic but looking for any advice on how to help my friend.
My best friend has separated from her DH in the last week but was trying to live in the same house. He has a nasty temper and even long before they had marital difficulties often flew into a rage and shouts/swears, punches the walls etc- there is evidence of this in the fabric of their house but he has never actually hit her. If she had ever posted even a fraction of the mood swings and unreasonable behaviour she gets from him on here she would have been told to LTB. And she did three years ago when he told an occupational health review that the reason he was staying off sick was because of her financial abuse and it got referred to social services before he essentially had some sort of breakdown and got help and medicated, diagnosed with ADHD and autism and gave up his marijuana habit. She has been more withdrawn from him since they got back together, understandably as he is unstable, which angers him as he wants her to fully commit and embrace the toddler tantrum side of him but they seemed to be doing OK until the final straw last week that he has deluded himself into thinking she is having an affair. All his "evidence" ("I touched your bum and you were wearing lacy pants and then later they weren't" type stuff) is completely ridiculous and she couldn't answer any of it because it is all in his head so it has escalated to separation but I think she was relieved.
She has just rung me to say that their cleaner has warned her that he has been secretly filming while baiting her and gathering evidence of her "abuse" when he eventually gets her to shout at him and has been talking to a friend in the police about pressing charges against her. I asked her whether she had done anything that an innocent bystander might view as abusive and she said she wouldn't be covering herself in glory- that she has been baited into shouting and swearing at him. But having seen his shouting/swearing/punching walls rages over the years I would be extremely surprised if she (who naturally withdraws into her self and chooses flight over fight) could have done or said a fraction of what I have already witnessed from him over the years over really mundane issues. She agreed but since she hasn't been secretly filming him then she is now very worried that she will be made out to be the bad guy and that police/social services etc would believe him and is scared of what he is going to do.
I'm not sure what he is trying to achieve in this, other than the fact that he smokes a lot of pot again and is frankly delusional. He stopped for a while after they separated the last time but since he started again he has become obsessive and paranoid again. I thought when she said he had deviously got onto a medical marijuana trial that it would be the beginning of the end and that seems to have come true.
They have already said they are separating so I dont know if he thinks he will get a better divorce settlement or something (she is the higher earner) or if he has just been drinking the Koolaid and believes his own crap and wants everyone to think he is the victim but any advice on how to help her? And if this is likely to be taken seriously by authorities?