I appreciate your thoughts on this. I'm not sure what drugs she could have used to instantaneously incapacitate Heidi enough to drive away without any fight from Heidi. I'm not sure, but some drugs might not show up in a tox report. Ether?
How about this scary drug called Devil's Breath?
Scopolamine can be administered through aerosols, cigarettes, gum, or in
powder form. Typically, travelers are approached by
someone asking for directions; the
drug is concealed in a piece of paper and is
blown into the victim's face.
Is Scopolamine the world's scariest drug?
Female 'Devil's Breath' criminals are blowing drug powder in victim's faces | Daily Mail Online