Hanlons razor would not be used to explain a tiger eating a person.

Hanlon's razor would be used to stop a mob from lynching the tour guide that was supposed to guide that person through the zoo. One explanation is that the tour guide intentionally arranged for the person to be eaten. This is malevolent and dispicable act. Hanlon's razor says "Hold on, maybe he just wasn't aware the tiger was out of the cage at that time".

It is effectively the presumption of "Innocence (stupidity)" vs persumption of "Guilt (malevolence)" stated another way.