or something genetic that may not have been caught and treated to explain why he's doing what he's doing?

For example it wasn't until recently that I found out from my son's Pediatrician that those with ADHD ( I'm ADHD as well as my son ) have a higher likelihood of experimenting with drugs and alcohol.

"People with ADHD tend to be more impulsive and likely to have behavior problems, both of which can contribute to drug and alcohol abuse, researchers say. Also, both ADHD and alcoholism tend to run in families. A child with ADHD who has a parent with alcoholism is more likely to also develop an alcohol abuse problem."