You can't say it was exactly your fault, but you couldn't say you were innocent either... your friend had just died via execution and Kokichi wouldn't stop mocking them, while you sat in your seat in grief and infuriated but forced yourself to stay still.

"They were so patheeetic." Four mocking words that caused you to completely snap. The last thing you remember happening was your chair knocking over behind you from how quickly you stood up. Now, from the actions of your blind rage that you had no recollection of, you were pinned beneath Maki while Shuichi said/did something to ground you once more. You did not recall what happened, but looking at the bloodied, barely conscious mess that was Kokichi, it didn't take a genius to figure out what had happened.