A security guard supervisor was working at a shopping mall when he fell off an electric three-wheel vehicle and suffered a traumatic brain injury. Because of his brain injury, he had no recollection of the accident or whether he was wearing a helmet. Witness testimony and surveillance video indicated that the guard was wearing a helmet but the chin straps were pulled through the back of the helmet. The employer sought to reduce the guardÂ’s benefits by 25 percent due to...