The Banished Prince

I see my father's killer stab him with the knife my own father gave me.
"Father!" I cried.
The killer snapped his head up to look at me. People were coming to my father's study! Right before they entered, the killer disappeared.
"Your highness, what have you done?"
My eyes snap down to my hands. There was my knife covered in my father's blood.
"Traitor!"
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Caspian Griffin is, well was a prince. He didn't know how it happened but, he did know that he didn't kill his own father. He is been a wanted fugitive for 3 months now and he's gotten no where to finding the killer.