Well, I dislike the murderer´s character for many reasons, but one of the most important is the way he kills the old man when he is absolutely with no power of fighting back. The old man with the vulture eye is completely unaware of what is going on. I like a good old book murder, but for some reason, or maybe because of the character I didn´t enjoy this one. Also, the whole process the murderer made before the murder indeed got me all confused and disappointed. He used to go to the old man´s room every night, for seven nights, but he described that he wasn´t able to kill him because he didn´t hate the old man, just his eye, and the eye was closed. But on the eighth night he sees the eye opened and showing his clouded, pale blue colour and kills him.
The murderer also insists on his sanity even after the murder when just by committing murder and dismembering someone is enough proof that you are not sane. He keeps insisting on it, and uses the excuse that the plan was so good and controlled that an insane person wouldn´t be able to make it. The murderer continues with his insanity and because of it he develops a disease, which is increased by nervousness too. The sickness is called "over-acuteness of the senses". Because of the "disease", the murderer believes in the hallucination of the old man´s beating heart, under the floorboards, he listens to the beats so loud and clear he comes forward to the cops.