This must be a very confusing situation for you, trying to balance your needs for safety with your valid concerns for your brother. I think you should try to find safe ways to communicate with your brother. When mine was in trouble, I just made clear that he could call anytime he needed help, and I would be there. Eventually, he called, and I was the first call simply because I had made clear I would help no matter what -- no judgments.

I would also encourage you to begin speaking with your local child welfare agency (depending on your state, it might be the Department of Children and Families, or Depatment of Family Services, something like that). Department case workers are usually overwhelmed with too many cases, but in my experience most of them care and may have ideas on how you can safely monitor things or they may be able to help also. If you call and explain your concerns, someone should be willing to sit down with you. If you get brushed off the first time, call again a few days later until you get someone who will give you the time. Stick with it, your brother is worth it. I think you need to do something for your peace of mind, and this way may help.

Hope this helps.

Be well,

mtd