Per the autopsy report linked above :
A.Blood drug and novel psychoactive substances screens: 1.
Fentanyl 11 ng/mL 2.
Norfentanyl 5.6 ng/mL
3.4-ANPP 0.65 ng/mL
4.
Methamphetamine 19 ng/mL
5.11-Hydroxy Delta-9 THC 1.2 ng/mL; Delta-9 Carboxy THC 42 ng/mL; Delta-9 THC 2.9 ng/mL
6.Cotinine positive
7.Caffeine positive
IANAD, and IANAL...however IMO, the combination of the two drugs
BBM can create havoc on the human body. Per this article/ presentation on Meth ( Called 'Ice' in AU ):
https://cracksintheice.org.au/pdf/cracks-in-the-ice-presentation-notes.pdf
"Using ice with depressants such as alcohol, cannabis, heroin or benzodiazepines (‘depressants’) places extra strain on the heart which may lead to
serious complications, especially among people with pre-existing heart problems. "