Judas was probably in the crowd that witnessed the trial of Jesus. After he saw what had happened, he realized what he had done and was remorseful.
As Judas reflected upon the gravity of his sin, he took the betrayal money back to the chief priests and elders and declared the innocence of Jesus. They said, “What is that to us? You see to it!”
After throwing the money down in the temple, Judas went out and hanged himself. There were some things he should have done to show a genuine repentance. He should have gone to Jesus, even on the cross, and confessed and asked for forgiveness. Judas should have gone to the apostles and made things right with them. He could have even gone out alone and preached the divinity of Jesus. Suicide ended all hopes of correcting the sin that he had committed.
Even though deemed permissible to take money out of the treasury for the shedding of blood, Jewish tradition prevented the priests from returning it to the treasury because it was “blood money.” Instead, they purchased the potter’s field to bury strangers.
It was called the potter’s field because it had been dug up for the clay to make pottery.