My oldest son was diagnosed with depression at the early age of 8. By the age of 11, he was also diagnosed as ADHD. By the time he was a teenager, he was taking ADHD meds, anti-depressent, and anti-anxiety. I will tell you, with all of those medicines, there were kids at the junior high that would have paid him $20 / pill to get their hands on his ADHD medicine.
I will also tell you that the psychologist said that if we had not diagnosed and treated him at an early age, by the time he was a teenager, he would be self medicating. The psychiatrist and psychologist both warned that if he didn't learn to control his symptoms or didn't take a medicine that worked, the studies showed that kids would self-medicate and abuse drugs and/or alcohol. I believe this to be true. Now that my son is older, he is weaned off of most of these medications as he has learned to control his behaviors and as puberty changed his chemical make-up.
I feel extremely sorry for Cooper and for his family. I do NOT judge him. No matter the circumstances, he did NOT deserve to die. So young, so much life yet to live. Prayers for his family for peace during this difficult time. R.I.P. Cooper. May your tragic death bring about discussions for a change for good somewhere.