There are other diseases like cancer mentioned. How does this work?

https://en.m.wikipedia.org/wiki/Darwin_Awards

If he gets cancer and opts for euthanasia how would that be counted? Same goes for has something like a stroke or major heart attack and then dies of flu or another common illness?

@BarryJones

Does assassination fall under homicide?

Seems unlikely

I assume "Attack by a feral animal" includes being eaten by a bronteroc.