Liu took the blame for it and was arrested, sending Jeff into a deep depression. The bullies later attack Jeff again at a party, and Jeff kills one of them, but not before getting covered in bleach and lit on fire by Keith. During this fight, Jeff's mind permanently snapped. When Jeff woke up, he was at the hospital and his head was wrapped in bandages. When the bandages were taken off, it was revealed that his face had become disfigured and ghastly pale from the burns, with bright red lips and a leathery texture.
Jeffrey Woods | Jeff the Killer/Slender Man - Works | Archive of Our Own