Stepping away from animals and more recent fare, let's take a look at a Poor Bastard from the late '80s/early '90s.
At the beginning of Basket Case 2, the previously-conjoined twins are in the hospital after their fall eight years earlier...er, I mean, hours ago. A cop is assigned to watch the door, since the pair are implicated in a few murders. The young man wakes up from his coma and frees Baliel in order to aid in their escape. After the guard chats up a nurse, he vigilantly returns to his post...and is choked to death.
Unlike a lot of figures in situations of this nature, the man did not 'set up' his death by saying mean things about freaks or anything like that. He was just doing his job- so he had to die!
Next up, a man learns a simple lesson: never do your job while Clint Howard is nearby. Stay tuned...