Stoowarb is the murderer but the thing is there's something that controls him to kill monsters killing Talkerr was the only successful murder the thing that controls Stoowarb at night has done. The time is 9:23 pm at that moment. When it hits exactly 1:00 am Stoowarb passes out and the thing that controls him stops but at 8:59 pm the thing controlling Stoowarb takes control.