Supreme Court judge Paul Coghlan has spent more than 50 years investigating, prosecuting and judging serious crooks on serious crimes. Coghlan, the grandson of a Chinese merchant, innkeeper and opium dealer, became Director of Public Prosecutions during Melbourne's gangland war, brokering plea deals that cracked the underworld's wall of silence.  From prosecuting a serial killer to pursuing a dodgy detective in one of Australia's first wire tap cases, Coghlan opens up to veteran crime reporter John Silvester in another episode of Naked City. And a heads-up, there's a language warning for this one.  Become a subscriber: Your support powers our newsrooms and is critical for the sustainability of news coverage. Becoming a subscriber also gets you exclusive behind-the-scenes content and invitations to special events. Click on the links to subscribe https://subscribe.theage.com.au or https://subscribe.smh.com.au See omnystudio.com/listener for privacy information.