Trainor or Traitor? True Identity

I'm inside the dungeon right now. I'm here for about a week now. This is a good thing for me, the power are slowly overtaking my body if this power didn't get out of my body. The whole academy might be in danger because of me. "Hey..." someone called me.

I run infront of my cell and saw a guy in his 40's. "I can help you with your locked powers and ability." he said. My forehead creased. "Who are you?" i asked. "I'm Valentine. The former trainor of Thalia." he introduce. Thalia? "You mean Thalia Cybele Imperia?" i asked. He nodded. I can see that he is telling the truth. "Why are you here inside the dungeon?" i asked him. He looks old--- i mean he looks like he in his later 40's.

"Because the traitor inside the Palace. I'm here because someone framed and blame me for her death." he said. I already read it in the book but the book says that he is not the traitor.