"Coroner's investigators said the drugs likely did not contribute to the June crash, which they classified as an accident. "
"Hastings had been using the hallucinogenic DMT recently, though the drug was not detected in a blood test after the crash." [1]
[1] https://www.theguardian.com/world/2013/aug/21/michael-hastin...
This sounds like a story made up by someone who doesn't know how DMT works.
Somewhere in my archive is a declassified doc from I believe the CIA about putting a dead man in a car and then (RC) crashing it. Just tried to find it... maybe someone else has the link. Either way, it's painfully obvious that was a hit. He emailed close confidants right before about needing to go off the radar because of a dangerous story.