I had a chance to talk with a substance abuse counselor today.
This is a woman who has callouses on her callouses.
She expressed concern about the up-tick she has seen in her ten-panel tests where positive cannabis panels (expected) also registered positive for benzos (Benzodiazepines, typically PCP or designer analogs) three days after start of detox. These are kids in their mid-teens in small-towns.
The minors swore that all they had done was "smoked a little weed", for what that is worth.
One counselor, one town, a handful of tests. Take it for what it is worth.
Michigan legalized recreational cannabis for adults over 21. Good luck keeping it out of the hands of minors.
One of the counselor's concerns is that benzols/PCP are considered "highly addictive" and with drawl symptoms are potentially fatal. This is not grand-pappy's Mary Jane.
The people who lace weed with PCP and other hard-core drugs should be shot.