I finally found who has betrayed me behind the back inside the University.
Psalm55:12-14 says, "If an enemy were insulting me, I could endure it; if a foe were rising against me, I could hide. But it is you, a man like myself, my companion, my close friend, with whom I once enjoyed sweet fellowship at the house of God, as we walked about among the worshipers."
Ah! King David, you are so thoughtful as you found the true enemy, who was the son of the devil. The liar is that person that I have suspected to be so since the beginning of this trial.
As 1 Corinthians 5:5 we read, “To deliver such an one unto Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.” I agree with St. Paul's instructions on him. All we can do is to have the right hand of our Lord be extended over his soul to be delivered to to Evil One's belonging. It must deserve for him.