OP, I think you've done really well.
DD is 15, she has a friend who's father has been in prison for drug-dealing. The friend has been selling drugs and given the money to another friend who had some money problems. In dd's book that makes him a really kind person.
He smokes, he takes/has taken drugs. His uncle, died suddenly less than a year ago at the age of 19 due to a heart problem. He has the same heart problem. Dd is saying that she wants to give him her heart - she doesn't want to know about blood groups, tissue types, logic or anything else. Basically, out of some sort of skewed hero-worship for him, he can't do anything wrong.
She wants to die before she's 30 - she says if we stop her smoking, we're making her self-harm. Her psychiatrist, says give her an ultimatum and point her to a knife. (All Sabatier, and kept well-sharpened - she's covered in scars.) Another psychiatrist told us to clear the house, garden, wash-house of all possible harmful subtances/object or lock them in a cupboard - we've got a petrol mower, strimmer, branch muncher, kitchen knives. The GP says that we're legally liable if we don't call the emergency services when she makes suicide/self-harming threats. The psychiatrists say that when she attacks us it's a mental health problem not a police one. The police say that if she were their daughter they'd slap her one.
We can't think what to do for the best, to try to get her to take a step back from his problems, illegal activities. Apparently he's facing prison at the moment, and his dad will only allow him out to see her, none of his other friends - even though it's causing us problems. We wish they'd never moved into the village - we're thinking of moving anyway. However, we've got an assessment for autism - probably PDA - in September/October, and if we move, it will be another authority and we'll have to start the same application process over again. Along with the typical symptoms of pda, she has a pathological need to be in control of her environment, and is both physically and verbally violent - the fear of the threat of violence every weekend when she's home makes me feel suicidal from the stress of walking on egg-shells.
Wish there were a guide book.