Judas Iscariot committed suicide when he realized the evil that he had done. Matthew 27:3-5 (KJV) 3 Then Judas, which had betrayed him, when he saw that he was condemned, repented himself, ...
This is similar to another question "How did Judas Die", but is specifically addressing another aspect of the story. In Matthew we have the priests purchasing the field: Matthew 27:5-7 (NASB) ...
Luke 22:3 (NIV) Then Satan entered Judas, called Iscariot, one of the Twelve. Does this verse imply that Judas had no more control over his own actions as he was possessed by the devil. ...