Iforget, this is a tough time of year for people with depression. Please let your brother know that you love him and are there for him. Do what you can but remember that the decision to live or not is his, not yours.
My father committed suicide almost five years ago. It was his second attempt. After the first attempt, my husband and I did everything we could to help him live. We arranged for hospitalization, a good doctor, medication, emotional support, a place to stay . . . but ultimately he decided that he didn't want to continue living. Yes, I lay the blame right at the feet of Jehovah's Witnesses, but my father made the choice to end his life and there was nothing I could do about it.
If you can get him to see a therapist or psychiatrist who has experience with people exiting a cult, that would be very helpful, but he has to be ready to accept that help.
Please let him know that he's not alone and he does have choices in his life. And let us know how he's doing and if we can help in any way.
Hugs,
Nina