If I were to cast [mtg:Hijack] on one of my opponent's creatures then, while that creature is under my control for the turn, I cast [mtg:Blood Divination] targeting the creature I took from him/her. Does that creature go into my graveyard( since I control the permanent), or does it go into my opponent's graveyard? 

This happened recently while playing with friends and we just decided to put it in the original owner's graveyard.