It is a stretch to call a death like this ‘accidental.’
It's accidental in the sense that he was taking the drugs for recreation, and not with the intention to commit suicide. The article mentions that he was also taking Adderall, which many kids and young adults are prescribed for hyperactivity. Kids don't typically go to the pharmacist and ask about drug interactions when their other drugs are from the street.
The article also points out that many of the "traditional" rec drugs are now being laced with fentanyl by the pushers. It creeps up on users and BAM! Lights out. Truly a scourge.
As a devout family, the parents did everything they knew how to do. This was a fatal error on the part of a young man who gambled with bad choices.