He never asked Jesus to forgive him. He did not experience spiritual penitence but only emotional remorse
You really think so?
40 But the other answering, rebuked him, saying: Neither dost thou fear God, seeing thou art condemned under the same condemnation?
41 And we indeed justly, for we receive the due reward of our deeds; but this man hath done no evil.
42 And he said to Jesus: Lord, remember me when thou shalt come into thy kingdom.
Luke 23