Hi Min,
In our state we have a Youth At Risk program. Sounds like your son's friend qualifies. Have them contact DSHS and explain the risky behaviors he is getting into. In the case of my son's former girlfriend (who ran off for 2 weeks), they first put her in juvenile detention for a night or two, and then she had to go to court. She asked to get emancipated, but the judge told her off so fast her head spun. He ordered her to early curfew, NO missed school, NO problems at school, and if her parents called in any problem at all--she would get at least 1 week in juvenile detention.
Scared her into being behaved. She's doing MUCH better.
I had NO IDEA that resources like these were available, because most people usually find out about them after crimes are committed. I was able to use this information to request and receive counseling for our son, who was borderline for being at-risk. The counselor told him, after hearing everything, that if he refused to obey me when I told him to stay home, then he would be entered into the program and have restrictions.
Scared him into listening to me much more.
I hope that your friends can get help for their son soon!!
bebu