The very drunk man(the narrator) cut out one of Pluto's eye. This is the very first crime committed against Pluto.
The narrator hanged Pluto this time. Pluto dies but another black cat comes along that has the same injured eye as Pluto. This cat comes along to hunt the narrator. The narrator also kills his wife later on.
The narrator hides his wife's body. The police come to see if everything's alright. The narrator thinks that he did a excellent job at hiding the body behind the wall of stones. He gets to full of him self and than he strikes the wall where his dead wife's body lays. Than there is a strangled noise from behind the wall. NOw the police man get to work. They find the body and the cat who exactly looks like Pluto.