 Police in Letcher County are searching for a teen accused of biting the tip of his sister's nose off during a brutal assault. The Mountain Eagle in Weizberg is reporting that 18-year-old William Dakota Phillips has been on the run since he allegedly assaulted his sister, 14-year-old sister, early Saturday morning. The paper is reporting that the siblings got into an altercation at 4.30 a.m. Saturday near the grandmother's house in the Isom community, and that the younger sister suffered not only the injury to her nose, but also a large bite mark on her wrist and bruising and swelling on her neck. William Dakota Phillips' sister underwent plastic surgery at Niswanger Children's Hospital in Johnson City, Tennessee following the incident. The Mountain Eagle is reporting that police have not yet determined a motive for the attack. The Weizberg Police Department is asking anyone with information about the incident or Phillips' whereabouts to contact them at 633-2737.