Let's view this case from the beginning.

ACT 1

After monovoid announced the motives for the first murder, a lot of people were on edge.

Especially Foxboy and Liam.

Soon after the announcement, the two of them snapped and got into a fight in front of everyone...

While we were nervously trying to break them up, one of us was omniously observing the situation: The culprit.

Afterall, they had just conveniently found the two key frames for their plan: The victim and their scapegoat.