He was chosen for a bad job. He sold Jesus out. But then, he tried to take the money back but they wouldn't take it back. Maybe he felt true sorrow for what he did. Isn't that the first step to repentance?
He did not forgive himself in the firstplace and took his life in his own hands..whereas Peter truly repented and went back to God for mercy.. Forgiveness is recieved by forgiving self and others...thats what the Lord prayer teaches..
The decision to recieve mercy or not can be taken only as long as one is alive.. after that it is judgement time.
You can help the HubPages community highlight top quality content by ranking this answer up or down.