Griffin was still uncontrollably freaking out. It was unlikely he would stop anytime soon
Monokuma: Allow me to shed some light on our poor friend. But to tell that tale, let's start with Autumn. She had been freaking out about the bomb for hours. When she began to think no one would save her, she got full of despair and start to inflict pain to herself, hence the bruises. She declared that she wanted Fiona to die next, and then Jake, so the siblings would feel the same despair that she felt being alone. I gleefully agreed, and left that note in her pocket. But then the unthinkable happened. Monomi rescued her out of the hidden location! Autumn gleefully ran out to find her friends, finally full of hope and remorse at what she had said. But sadly, the first person she ran into was Griffin, who had already panicked and was looking for someone to kill. She ran to greet her friend, unaware that she was about to be brutally murdered! He pinned her down and started hacking away at her hands, until they came off! Finally aware of what he did, he flung the body towards the door, coincedentally just as Irine opened it. Realizing he was soon to be caught, he once again panicked and tried hiding and evidence, and in the process accidentally stabbed himself in the rib! Realizing his luck, he capitalized on it, claiming he was stabbed by Autumn's murderer! And if he had just kept his mouth shut, he would have gotten away with it too, upupupupu...