Oh, he's on a small trip and will be back in two weeks time.
He hides the decapitated body of the old man under some loose floorboards.
Not even a moment later, the deputies arrive, and inquire about loud noises.
I did the deed! I have killed the old man, please make the noise stop! PLEASE!
He allows the police to come in and take a look around, certain that they will find nothing.
This is just the beginning....
He even offers for the deputies to take a seat, in the exact room where the old man's body is buried. However, he starts to hear a slow rhythmic thumping, the sound of the old man's heart. He begins to talk louder and faster trying to drown it out.
Eventually he can't stand to hear the beating of his heart so he falls to his knees and yells with all his might.