Depends on what "die from their narcotic pain meds" means, and how big the high school class is, how long they've been out of school, and where their school is located.
So your class had a 1% death rate due to prescription opioids. Why do you suppose it was so far out of proportion to the general population? drugabuse.gov says prescription opioids accounted for around 15,000 deaths in 2017 [1], so 12 in a single high school graduating class is either a massive unexplained spike in the data, or something you made up.
I'm not who you're replying to, but don't you think that given we know pill mills exist, it's likely the data is actually highly location specific? I.E., a city with one is more likely to have lots of ODs compared to the national average? Have you taken a statistic course? At this point I'm not sure what you're objecting to anymore.
You're referencing media I don't know, I don't understand why you don't think the scope of the opioid crisis that has claimed thousands could involve the deaths of 12 people with 1 thing in common. Pill mill pharmacies are a thing, and some of those pharmacists have been charged with crimes.