Tyler Cassidy was a troubled kid. Police officers Colin Dods and Richie Blundell were working an afternoon shift in the Northcote divisional van. Their lives would collide on a balmy summer evening in late 2008 at a Northcote skate park.

A distraught Cassidy, 15, was in no mood to negotiate with the officers. He refused to drop two knives and kept approaching Dods. He was shot six times, and died at the scene.

The police involved lived for years with allegations that it was their fault. Vindicated in the Coroners Court of Victoria, they tell John Silvester their story.

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Very few people have heard of Detective Sergeant Dion Achtypis - but there may well be no more important investigator in Australia.

You won’t see him holding a press conference at a murder scene or commanding a squad of detectives. And he doesn’t use a sledgehammer during raids - he gains access in a much more subtle way. He is part of a three-person team working in the present while exploring the future.

Cyber cop Dion Achtypis sits down with John Silvester to discuss Bitcoin, international crime syndicates and the Underbelly series.

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Belinda Bozykowski was never a police officer. But her partner, Laurie Fox, was.

On the last day of 2012, Fox took his own life, leaving her with two young sons, a broken heart and a million questions.

Belinda is as brave as any Valour Award winner. After her partner's death, she completed her midwifery course, cared for their boys, and dedicated a great part of her life to the mental health of first responders.

It is perhaps the only way she could make sense of something so indescribable.

Between laughter and tears, Belinda shares her story with John Silvester.

If you or anyone you know needs support, call Lifeline 13 11 14, Mensline 1300 789 978 or visit www.beyondblue.org.au

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