If you kill someone and stand over his dead body, you may see CJ's head looking on the dead man's head like the dead guy told him something. If you press Y or N, CJ will answer the dead man, even though you never heard the dead man actually talking. You should stand with your legs pointing to his, like he's a floor miror. Doesn't work with cops or people who died from a head shot.
Lock the topic if it's old.