Hi DHF19,
Welcome to the Forum.
I am the Mum of an addict in Recovery, and I fully understand what your Mum and Dad are going through, it’s not nice having to tread on egg shells in their own home and putting up with mood swings and stealing.
Be there for your Parents as I’m sure you are.
My Son has been to Rehab, you don’t have to get the Police involved, but it is very costly but well worth it.
There are always on line meetings that your brother could take part in, but, only if he wants too, he is the only one that can make the decision that he needs help.
Can you try and talk to him when he is not high, or is there someone else who could talk to him?
There is lots of useful advice on the Forum and you could also contact the Icarus Trust.
Take care and keep in touch on here, I hope things improve very soon for your Parents.
Dx