Who do 你 think that holds the 刀 in the Degrassi?

I'm sorry to say this, because I'm a HUGE Eli fan, hes the only character on Degrassi I really liked, but I think he is the one that holds the knife...Something inside of me is telling me its him, I wish its false. No I hope its false and that Im wrong, but after watching the episode and how things builds up...
Everyone thought its Fitz...but im not totally sure.

Who do 你 think that holds the knife?