He was a 'crooked hat', a bent copper, and he was working with a notorious Dutch crime cartel to flood Australia with millions of dollars' worth of drugs. To those who knew him, Mark Standen was a stand-up guy, a top cop who was never one to mince his words. As an assistant director for the NSW Crime Commission, he led some of Australia's most high-profile criminal investigations and, as a 30-year veteran in law enforcement, there was little he didn't know about the underworld. He had been privy to every top secret police operation into organised crime and international drug running in Australia except one - Operation Octans, which saw him arrested as the mastermind behind one of the country's largest drug-smuggling plots. Standen's breach of security was breath-taking, prompting a review of every major police operation he had knowledge of. The fallout from discovering this rat in the ranks - a man driven by sex, greed and an insatiable gambling habit - reached around the world.