Psalm1 where in scripture does it tell us this that John represented the Levitical priesthood and where he passed on that priesthood to Jesus.
5THERE was in the days of Herod, the king of Judea, a certain priest named Zacharias, of the course of Abia: and his wife was of the daughters of Aaron, and her name was Elisabeth.
6And they were both righteous before God, walking in all the commandments and ordinances of the Lord blameless.
7And they had no child, because that Elisabeth was barren, and they both were now well stricken in years.
8And it came to pass, that while he executed the priest's office before God in the order of his course,
Caiaphas was a roman appointee. The priesthood at the time was corrupted. And John was a legitimate levite by birth.
OK, now notice the priesthood of Jesus
11If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need was there that another priest should rise after the order of Melchisedec, and not be called after the order of Aaron?
12For the priesthood being changed, there is made of necessity a change also of the law.
13For he of whom these things are spoken pertaineth to another tribe, of which no man gave attendance at the altar.
14For it is evident that our Lord sprang out of Juda; of which tribe Moses spake nothing concerning priesthood.
15And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another priest,
16Who is made, not after the law of a carnal commandment, but after the power of an endless life.
17For he testifieth, Thou art a priest for ever after the order of Melchisedec.
So one could possibly argue the exact change or time of change(of the priesthood)
But notice "a change in the law" and the Jordan has over time been a place of change.
Note also it is consistent,or proper that the Romans whipped our Lord,crucified him,beat him,tried him,and pierced him.And now with a corrupted preisthood and that 'office' suffering further the tearing of ciaphus' robe left the needed dilema.......no way to officiate the passover.
Israel and its priesthood were under roman control and the priesthood's need,established by Adams sin,HAD to have a point of change.
The seamless robe of the priest could not be torn.
It disqualified the priest from service.
How exciting Jesus' robe was NOT rent.