Others have commented the assassin is a time traveller. Time travel has nothing to do with it! Affect an unrelated thing in such a way that the knock on effect leads to the death of the intended victim.
This Is What Your Handwriting Says About Your Personality
Interesting Dog Fact - Dogs and rain - the reason that dogs hesitate before going out into the rain is not because they're afraid of getting wet, it's because rain amplifies sounds and their ears are so sensitive it can be too intense for them.