sentences:  He moved to California in 1976, and after having legally changed his last name to Barnes, stole the identity of a licensed medical doctor in Stockton, Gerald Barnes, and worked as a physician in the Los Angeles and Southern California region for the next three years.In 1979, his negligence and lack of medical knowledge contributed to the death of John McKenzie, a 29-year-old undiagnosed Type I diabetic from Anaheim who had complained of a dry mouth, chronic thirst, dizziness, and rapid weight loss.Although these were classic signs of uncontrolled diabetes, Barnbaum gave him a drug for vertigo and sent him home.