Dramatic Irony: The ways the townspeople reacted to Bogg's death and their pushing and shoving to see the body.
Well, pretty soon the whole town was there, squirming and scrouging and pushing and shoving to get at the window and have a look, but people that had the places wouldn’t give them up, and folks behind them was saying all the time, “Say, now, you’ve looked enough, you fellows; ‘tain’t right and ‘tain’t fair for you to stay thar all the time, and never give nobody a chance; other folks has their rights as well as you.”
Situational Irony:
"'Some think old Finn done it himself... But before night they changed around and judged it was done by a runaway nigger named Jim.'"