William Brown died after his left internal carotid artery was severed due to trauma from the exploding vape pen he just bought from Smoke & Vape DZ in Keller, a town just north of Fort Worth, his distraught grandmother told WFAA. “He popped it and it exploded, and that’s when it shot across his mouth,” Alice Brown told the station. Brown claimed the device’s battery malfunctioned, melting bits of plastic from her car to the vape pen — which launched the charred debris into her grandson’s face and neck, leaving her car soaked in blood. Brown died at John Peter...