From your experience over the years, you’ve probably encountered a number of agitated drunk transports. What if additional substance if any might you see as a contributing factor?
I’m certainly not going to suggest MS was doing anything illegal drug wise, because frankly I have no idea. I also have no clue what prescription meds he may have taken.
If I was forced to guess, or went off my personal experience, Id say stimulants typically can contribute to that type of behavior.
Cocaine and Meth being the most common.
PCP although not necessarily a stimulant can cause all kinds of “crazy” reactions, but it’s not very common these days.
It’s very common for people that use the “legal weed” fake synthetic smokable to act crazy.
Run down the road naked and swatting at bees crazy.
Hell even the Steroids that folks use to build muscle can incite rage type reactions (depending on dose, person etc)
There just isn’t a clear answer to speculate on.
At the end of the day, it’s simply not going to be meds or street drugs that would be considered “downers”
ie opiates, benzodiazepines etc (typically speaking).
Exceptions to every rule however