Matthew 27 said that Judas when he saw that Jesus was condemned (not in Judas' plan...) he repented and went to be forgiven by the Sanhedrin. They shrugged their shoulders at him telling him to see to his own sin. In anger, he threw thier money back at them... then he hanged himself.
Not to belabor this, but an intelligent man, which Judas is generally thought to be, does not kill himself because he is angry at someone else.