Two serial killers who cut smiley faces on the corpses of their victims are chasing you. They are tracking you and you don't know why or how they find you

You are a detective and you are on the case. You walk to your car and see two men, one dressed in black and the other in white, looking at you from across the parking lot. You see them again for the third time that day, twice in the morning and now, in the evening, the parking lot empty just you and the two of them...