I know I killed the old man but his eye was spying on me. It needed to be gone
In his mid the thinks "I NEED TO GET RID OF THE EYE".
The caretaker loves the old man, he hand no reason to kill the old man except for a long time the blind eye of the old man kept bothering the caretaker. Until one day the caretaker could not handle this eye any more. To the caretaker the old mans eye looks like an eye of a vulture that was watching him.
The caretaker sees the eye of the old man and does not like it at all. He need it to be gone
It is late at night and the old man is sleeping the caretaker is going to check on him 7 nights in a row very carefully. He will only kill the old man when he sees the eye.
The Caretaker kills the old man and flips the matters on top of him. He finally gets rid of the eye.
The Caretaker chops the old man up and puts him under the floor boards in the bedroom. So know one can find out what he did.
The police arrive at the door because they got calls of screaming coming from his house. They investigate, but the caretaker admits that he killed the old man.