What happens when back up is three hours away, and you're faced with a violent and desperate situation?

Mark Tregellas is one of Victoria's most experienced regional police officers. He's spent decades tackling violent and intense criminal situations, ones that are unique to that of Australia's wild and often unpredictable regional areas.

Join host Brent Sanders as Mark walks him through two cases that stand out to him from his time in the force.

This content contains references to men's violence against women. Help is always available, dial 1800 RESPECT on 1800 737 732. If this content affected you, the number for Life Line is 13 11 14.

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Semen is the crack cocaine of the fly world, and while maggots love a corpse, flies feast on live human flesh and fluids. So, could a fly frame you for murder? And how do police differentiate fly 'artifacts' from human biological material at a crime scene?

These are all things forensic biologist, Dr Annalisa Durdle has studied. Join host Kathryn Fox as Annalisa redefines what it means to be a 'fly on the wall'.

If you or someone you know is experiencing, or at risk of experiencing, domestic, family or sexual violence, call 1800RESPECT on 1800 737 732, text 0458 737 732 or visit 1800RESPECT.org.au for online chat and video call services.

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The AFP and customs intercept hundreds of tonnes of narcotics every year. But, the techniques of criminals and smugglers are becoming more complex, and unfortunately, more effective.

Nigel Phair is a former Australian Federal Police Officer who took on a range of high profile drug importation cases. This saw him intercepting large quantities of drugs, investigating its origin and surveilling its eventual destination in Australia.

Understand this work and hear Nigel walk host Brent Sanders through how the police undertake these investigations and how things have changed over the years.

If this content affected you, the number for LifeLine is 13 11 14.

See omnystudio.com/listener for privacy information.