Kira can attach Bite the Dust to a person that knows his secrets. If they tell anybody else in any way, that person will die. Time then loops to earlier in the day, giving Kira the chance to find out who died. Events will play out nearly identically to the first cycle, and even if the dying person doesn't learn Kira's secrets the second time around, they will still die. Kira can't use Killer Queen while Bite the Dust is active, and if he retracts Bite the Dust its ability stops.