I am no expert.
My understanding is many people are/were hooked on OxyContin, because of over prescribing, and needless prescribing by medical doctors, coupled with recreational use. If OxyContin is hard to get, they are forced to go to other drugs, one of which is heroin.
More and more heroin that is being sold is either fentanyl, or laced with fentanyl, because it is so potent, easy to get, and cheap. All of these (Potent, easy to get and cheap) make the drug everything a drug pusher wants. I do not do drugs, but if I did and especially if I was hooked, and a friend told me JoJo had some incredible stuff, I would find the guy and buy his product.
This has led to an abundance of fentanyl laced stuff on the street, some of it is formulated at "Safe" levels and some of it isn't. Even with pure unlaced heroin there are occasional uncut or poorly cut batches that make it to the street and people die. No one seems worried about a dirty junky *****, but we do worry about Brittany or Hunter trying it at a party, when we never knew they became hooked by sneaking Mom's oxycontin pulls that Dr. Frazier prescribed for her backache.
One last statement. Selling drugs is a business where you know some of your customers will die - maybe not today, or tomorrow - but eventually the drugs will kill them. If you can't live with that, you are a lousy pusher. Pushers are killers. It is that simple.
Thanks for letting me rant about one of the worse problems society has seen - ever.