Hello again Jessica,   Again Christina gives sound  and very important advice.    I would just add if you can, do share a brief 'barebones' of how things are developing and the impending crisis scenario to a trusted, preferably female other ( if no good friend or family member is available or even in addition try ringing a woman's shelter crisis support help line). Obviously thinking through timing and your son's care at time of intervention needs careful thought to minimise his stress and reduce him being a witness to crisis unfolding. No doubt the professionals can help with good advice there.  Be prepared.   By the sound of what you say about your husband's illness actions such as Christina suggests, should trigger enforced hospitalisation to initiate appropriate treatment for your husband, without any risk to you or your child ,because the cause for concern is so clear. Involving the police is important.   But if for any reason that plan fails, or your husband pre-empts matters  and initiates a different course you need to be able to go quickly to a place of safety and separation at this time.   Make sure you have important phone contacts,etc ready,cell phone and charger, ' basic evac pack' handy, should you have to temporarily leave your home. But as Christina says be very vigilant, and keep these measures hidden.   Thinking of you,  Chris UK