Hearing Cassio's cries of murder, Othello believes that Iago has killed him. Inspired by what he believes to be Iago's successful vengeance, Othello returns to his bedroom to kill Desdemona.

Why does Othello kill Desdemona in her bed?

Emilia and Othello confront each other. Emilia sees herself as a witness and will tell what she has seen, and Othello declares that he has killed Desdemona because of her infidelity.

Where did Othello die?

Othello dies by his own hand. He lies next to the deceased Desdemona and stabs himself.