from Paradise Restored:
*** pm chap. 18 pp. 322-323 pars. 45-46 Consequences of Rejecting God’s Shepherd Ruler ***

“When it had become morning, all the chief priests and the older men of the people held a consultation against Jesus so as to put him to death. And, after binding him, they led him off and handed him over to Pilate the governor. Then Judas, who betrayed him, seeing he had been condemned, felt remorse and turned the thirty silver pieces back to the chief priests and older men, saying: ‘I sinned when I betrayed righteous blood.’ They said: ‘What is that to us? You must see to that!’ So he threw the silver pieces into the temple and withdrew, and went off and hanged himself. But the chief priests took the silver pieces and said: ‘It is not lawful to drop them into the sacred treasury, because they are the price of blood.’ After consulting together, they bought with them the potter’s field to bury strangers. Therefore that field has been called ‘Field of Blood’ to this very day. Then what was spoken through Jeremiah the prophet was fulfilled, saying: ‘And they took the thirty silver pieces, the price upon the man that was priced, the one on whom some of the sons of Israel set a price, and they gave them for the potter’s field, according to what Jehovah had commanded me.’”—Matthew 27:1-10.

Because the money used by the priests in the purchase of the potter’s field had been provided by Judas Iscariot, the apostle Peter speaks of Judas as having bought the field for the burial of Jews who died while visiting in Jerusalem or of proselytes. Peter said to the Christian congregation regarding Judas: “This very man, therefore, purchased a field with the wages for unrighteousness, and pitching head foremost [after hanging himself up high] he noisily burst in his midst and his intestines were poured out. It also became known to all the inhabitants of Jerusalem, so that that field was called in their language A‧kel′da‧ma, that is, Field of Blood.” (Acts 1:18, 19) The priests merely acted for Judas in taking the money out of the temple sanctuary where Judas had thrown the thirty silver shekels and conveyed it to the seller of the potter’s field. The priests saw the unfitness of dropping the “price of blood” into the temple treasury, but at the same time they thought themselves fit to serve in that temple in spite of their having caused that blood to be shed.

Even after reading this, I still can't tell. You could interpret it either way.