Three years into an expensive overhaul of state prison health care, the state in 2008 spent $60 million on health care overtime. Many medical staffers are working 16- and 18-hour shifts; the average is 12 hours. Spending on medical temps is another issue: Doctors who are not state employees have made as much as $527 an hour. Read The Sacramento Bee's two-part series on prison medical staffing: Part 1 and Part 2.