Ok So.
She was killed with a cleaver, a cleaver is a kitchen tool and there were kitchen utensils and the murder was in the kitchen closet, the cleaver would be easily obtained by someone who cooks alot or was in the kitchen last. the bat culdve been used to break her leg and create the hole in the back of her head, the cleaver would be too shar to do those things without precise hits. my run down, the culprit was cooking in the kitchen when they decided to start their plan, They probably turned off the electricity before they commited the murder. they grabbed the cleaver and waited until White walked into the kitchen closet, the culprit couldve been hiding nearby or have set up some sort of camera to tell when she walked in. Then, they got the bat probably from a shelf or outside and walked into the closet, they bashed White in the head and hit her in the leg making her stunned and not able to run away, while she was stunned they took the cleaver and chopped off her head. when heard screams, everyone ran in. They couldnt see anything so they used a nearby lighter to light up the room and they found the body.
My therory is that it couldnt have been anyone in the main room before they discovered the body,so Eddie, Spai, Kindo, Spring, Gleb, Spring, and Rojo are safe. But one thing thats confusing is that, when we found the body... Stella, Kokichi, and Cherry werent there! If you commit a murder, your obviously gonna leave the crime scene and get as far away as possible so your the least suspicious. However, I think Cherry was the murderer! She is a jerk number 1, and she has an axe/hatchet meaning she is experienced in using weapons! It couldve easily been her, however, she and Kokichi are friends so maybe he fits into this somehow, but he probably wont tell us because
cmon
hes Kokichi