[Abagail]

I would suggest using OnPlayerTakeDamage to see if they've taken damage. If they haven't taken any damage what-so-ever and OnPlayerDeath is called there most likely using Fake-Kill. You can find more information on OnPlayerTakeDamage, by going to the link below or clicking here:
https://sampwiki.blast.hk/wiki/OnPlayerTakeDamage