Dream Buster
Most first-world (and a number of third-world) will do enough pathology to screen for drugs and alcohol... most will look at the heart as well. What they don't tend to do is look for signs of OP poisoning, which is of course the subject of some debate...
Perhaps what should be examined is the role of slow, partially incapacitating illnesses, particularly those that affect judgement in such scenarios as the Wamena accident. Don't hold your breath, though...