2 words… Military School. That boy needs harsh discipline and constant supervision. They can provide that. I know it sounds heartless but from what your saying it honestly would be for his own good. He has no self control, which to me sounds very much like a mental disorder of some sort. (Just my uneducated guess.) Something like that his psychiatrist should be able to detect. You have the other two children to consider as well. Sounds like at some point their saftey could be at risk. Your in a tough situation for sure. I hope you find you solution soon.