First of all, you need to get the consent letter from the family if you are given the permission to take him for treatment/care. Take that letter along with you, bring him to one of the governtment hospital, to get him a certified letter regardless about his mental illness, especially with the stages of it. Then head to the welfare department, there are different homes in Malaysia meant for mental illness people, I do have a contact of them, if you want I can give you a hand on that. They do take care of them and cost will be free if he is under the care of those homes.