I don't have any information either way. I wonder who recommended/or, how the parents chose this camp.
In one of the earlier articles,
A state inspection report offers new details on the hours leading up to a 12-year-old’s death at Trails Carolina, a camp for troubled adolescents.
www.nbcnews.com
it is stated that
"Founded in 2008, Trails Carolina is a for-profit wilderness camp that treats children with diagnoses such as autism, ADHD, bipolar and post-traumatic stress disorders, as well as those struggling with depression or unruly behavior."
So while it could be "unruly behavior", the child could also have had any of the above condition.
I assumed that given his growth delay, the child could have had some undiagnosed, possibly, genetic, problem.
However, your words gave me another idea, a possible explanation for being small for age that I didn't think of before.