Who would you believe more the boy or the girl in this incident?

Who to believe? At a family function there is a commotion in the den, you and other family enter to find a boy 13ish wailing away holding his head which is bleeding like a fountain and bleeding from the mouth. His 16 year old female cousin is panting and hacking with a fireplace poker in her hand.

She say she was sitting in the sofa using her iPad Touch and he came up behind her and covered her whole face with a sheet of cellophane to the point she could not breath or make a sound. He would not stop or let loose even as she trashed about choking. She had to rear back with her head and smash him in the mouth before he let go. She said she then made her way to the fireplace and picked up the poker. She told him to leave but he said “B**** I ain’t going nowhere” and walked towards her so she cracked him in self-defense.

His story, he said he did cover her face but it was loose and he it was a joke, something he seen on a DVD. When he let lose she was panting and said, “F****** fool! What is the matter with you!?!” He said he told her to chill it was recreating a scene he seen in a DVD. She then said “F*** you!” and she belted him in the mouth. Then when he went to go pick up the cellophane wrap she snatched the poker and whacked him twice to the body and once to the side of the head and told him “DVD that mother******!”

So, who is telling the truth or is the truth somewhere in the middle of both?