Tyler Sanders, a young actor best known for roles on ABC's The Rookie alongside Nathan Fillion and 9-1-1: Lone Star with Rob Lowe, has died at 18. According to the New York Post, Sanders passed away at his home in Los Angeles and reps for the young actor confirmed his death in a statement on Friday. No cause of death has been determined yet. A funeral service is scheduled for June 27 in Houston, Texas.