'Unconscious' at 1.5mg/L heroin - rubbish!
I sat through this nonsense (whereby some slimeball is cashing in on all his illicitly recorded tapes) right up until the point where various qualified persons stated that it was not possible for someone with 1.5mg/L blood level of heroin in them to shoot themselves because they'd be dead/unconscious/whatever.
At that point I started thinking there might be some weight to this slimeball's story, so I did some searching and within about ten seconds found this: https://ndarc.med.unsw.edu.au/sites/default/files/ndarc/resources/T.R%20039.pdf which is a study of heroin users - what's interesting is that the users have been paid $20 to come in and answer questions and have their blood taken, and that several had very high levels (eg in the 1.45mg/L range). Now bear in mind that's not just after they've injected - and they've managed to get themselves to this clinic with those levels and answer all sorts of questions. Clearly some heroin addicts can operate almost normally with extremely high levels of morphine in their blood. The other thing that's interesting in the study is the length of time high levels can stay in the body - so these people aren't giving themselves shots that produce 1.5mg/L all at once, it's a level that builds up over 10 hours or more after two, three or more shots.
So clearly it's not unreasonable that a heavy user such as Cobain could have injected himself several times that day, culminating in the last hit, after which he would have been perfectly capable of putting all the works away in the cigar box and shooting himself.
Odd that the film makers are unable to use google like what I did. But then I guess there'd have been no money for the pond-life that made this.
This is a disgusting film made for the edification of a nobody, and only hurts the family and friends of Cobain.