Verbal Irony is here because the narrator states that he has love for the old man and wasn't killing him out hatred for him, but rather his "vulture" eye. The author automatically sets up the irony with this detail by emphasizing how we can't trust the narrator.
I love this old man not that evil eye though!
Situational Irony is present when the author includes the event of the police coming inside the room while the body parts of the old man was put underneath the floorboards. The audience would expect that the police was suspect something was off. Then arrested the man, however the arrest didn't happen on their terms.
Towards the part where the old man is killed, there is a moment of dramatic irony. It was when the hinge of the lantern made too much noise then resulting in the old man to wake up and sit there petrified. When he trying to convince himself everything was going to be fine the audience already know that everything wasn't because of the start of the story it was already revealed that the old man was going to be killed.
Everything is going to be fine
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