He was a highly paid neurosurgeon, addicted to cocaine and obsessed with sex. Yet despite significant evidence he was running out of control, and the death of a call girl he'd hired, Suresh Nair continued operating in a private hospital. In a joint Four Corners/Fairfax investigation, reporter Tracy Bowden analyses what the NSW Medical Board, Nepean Public Hospital and the Nepean Private Hospital knew about the rogue doctor.