Subscribe to Crime X+ today.

Chris O'Connor is a former Detective Senior Sergeant specialising in Sex Crime Investigation and during his 36-year career in the Victorian Police, he was widely regarded as one of the most experienced detectives in this field.

In part one, Gary and Chris talk about what it was like investigating some of the worst predators in the country, from child abusers to a man who was purposefully infecting people with HIV.

See omnystudio.com/listener for privacy information.