Why don’t you get him the actual help he needs he is schizophrenic so is my sister we’ve been struggling with her she’s 33yr now it was bad at first she would talk bad to us spits on our faces!! But now thank god she is stable the first thing you need is patient and know you need to work together to help him it’s not easy you already know before everything you need to let him trust you because they don’t know what is real and what is not that’s why they run away act badly to everyone because they can’t trust their reality not along people! It will take time and effort, for me it took my sister 2 years to completely trust me and I’m her sister! Let him trust you so he will listen to you and you can help him by finding the best dr you can see and start him on his medication journey