Biography: Charles Edward Sellier Jr. (November 9, 1943 – January 31, 2011) was an American television producer, screenwriter, novelist and director, best known for creating the American book and television series "The Life and Times of Grizzly Adam's" . He was also known for directing the notorious Christmas themed slasher film "Silent Night, Deadly Night" . Over the course of his four decade career, Sellier wrote and produced more than thirty films and 230 television shows.