First of all hugs, this isn’t your fault or his, I get your feeling lost and alone, your living through something horrendous that most people can’t begin to get their head round. It’s complex and it’s heartbreaking.
A few people have already mentioned Yvonne Newbold and her Facebook page The Send VCB project, honestly this is the person and the place - thousands of parents in the same situation, most of the comments here are been kind, but sadly judgement is all too common, a lot of posters are trying to be helpful but haven’t got the experience of how these things work, what the reality is like. The comments about placing your son in care, 1) as if this is so easy 2) much more this is your son, it’s hard but even if it was possible and so easy not many can just walk away from their child just like that!
It’s a long long road, be kind to yourself and get the support you can, nothing is more powerful than getting that from those that are going through the same and those that have worked through it.
I could have written a similar post, 4 years ago, the fear of the real possibility of one of your children killing the other is horrendous and being hurt by your own child is awful. It’s taken a lot of work, a lot of tears, sadly the “professionals” were mostly useless and often made things worse, but Yvonne Newbold and various books, eventually the right send school have got us to a place where it’s a million times better - it probably still looks a million miles away from “normal” to those lucky enough to have no idea, but we’re all safe, and happy, but it’s been a long , lonely, hard road. This isn’t the place for me to go any deeper, but I wanted to acknowledge what your living through and let you know it can get better, find your tribe these are the people that’ll get you through.