What kind of shotgun (28 gauge?) can embed 200+ pellets (primarily in the face and neck region), some deep inside (so as to cause heart attack), from 30 yards distance?

How much intoxicated you have to be to mistake a 6 foot human for a small bird?

How many hours it takes to totally eliminate any traces of intoxicating agents from body?

As I never used a shotgun (nor ever plan to) nor have I ever drank alcohol, I am kind of mystified. Any input would be appreciated.