I almost didn't post this, but I'm laying here fighting my own demons, and though it might be appropriate. I wrote it, and understand it better than I wish. Depression is an evil, debilitating, and often silent killer. The depths of the chasm you see opening before you are un measurable, and often you stop seeing the light.
I will share something I may regret.... at 14 I survived an attempt due to a bad primer in a shotgun shell. Making that decision is an incredibly complex and painful thing.
I hope your friend has found peace, and I hope you will be there for the family, and yourself. I've been the first voice many hear after finding a loved one, I'm always willing to offer what I can.