Write or Wrong, perhaps you know someone who would hire him to do some sort of job? I know someone whose son was OTD but he B”H got a job working for a frum plumber who really took him under his wing. The boy became frum eventually and is married now!
Your son would have a reason to get up in the morning and he would feel good about himself and what kid doesn’t like some extra money?
Hatzlocha rabah!