Hi there ~
I understand your concerns. I believe that your brother in law is using substances that are dependence forming and I am completely with you about your concerns for hi. I also believe that he may not be in the best place and it is in your best interest as well to have him go to treatment. I believe a consultation with a psychiatrist
or a local doctor should trigger hospitalization for acute detox and ultimately rehabilitation
. I wish you the best in getting you B-I-L to treatment as soon as possible.
I hope this helps. Take care of yourself and have a lovely day!