What was Picher was carrying when he was arrested: marijuanna (not heroin or cocaine).
I know it is illegal, but legal in some country. (like alcohol was not that long ago). Marijuana is sometimes use to alleviate some bad effect of cancer treatement.
Substance abuse is bad, alcohol, pills or whatever. What we neede is better education on the danger of addiction.
Education is helping to reduce the number of cigarettes smokers (or is it cancer), not that long ago smoking was cool, even some claim it to be good for your health.
I am not trying to justify Picher's action, he made mistakes and serve his sentence. Then cleared his name trough a legal process. It is call rehabilitation.
I suggest that you reread the official accident report before making accusations.