SBMI wouldn't be surprised if at the least, KM's toxicology shows some sort of heavy stimulant use.
If nothing else, he may have used something just to stay awake for all of that driving. BS may have done the same, to stay awake and keep him company.
BS could have been squirreling away his own meds in anticipation of the trip, or they could have purchased street drugs, or they could have purchased OTC stimulants. Or any combination thereof. It's possible that KM had his own meds; if he was attending VAST he may have had his own learning or behavioral disabilities that were being managed through meds.
Definitely stimulants is what I was thinking .... and I have also been wondering if Kam perhaps was on any prescription meds along with Bryer. In that case, they both could have been abusing those drugs. MOO