Remember: Saul of Tarsus persecuted the early Church and even held the cloaks of those who stoned Stephen to death, yet he went on to be probably the greatest apostle. God can change anyone. He can change Kim Jung Un should it fit into his plan.
It’s that type of example and say, that of David’s commission of murder, wherein God granted remission of their capital sins, that seems to make salvation so accessable.
Saul of Tarsus (later St. Paul) is NOT an Apostle, or one of the twelve eye-witnesses chosen by Christ. After his epiphany on the road to Damascus, Paul became an evangelist for Christ to 1st Century Jews and Gentiles alike in the Near East.
Most of what we know of St. Paul is taken from his epistles, or letters, to early Christian communities, and the Acts.
I suppose you can call him a disciple or an evangelist. But technically, he is not an Apostle. He was not one of the Chosen and had no contact with with Our Lord during His earthly Ministry.