I've been thinking of who could be our first murderer which seems to be a bit harder to put down then victim.
But I feel like it's a safe bet that none of the people capable fighting will commit (our couch, swordsman and gymniast respectively). I feel that wouldn't quite fit.
For now I'm tending towards Komaeda since he like Maizono seems to be the one to have the most contact with the mc at the beginning but on the other hand I feel like it could be a few other people, too.
Not exactly. Mondo was the strongest male character in the first game and he ended up commiting murder.