CTE is surprisingly common - but, it can only be diagnosed post-mortem, and by a forensic expert. So, how is does an examination work? And why is it so hard to have one done?

Dr Linda Iles is a forensic neuropathologist, and someone who performs post-mortem brain examinations on people every single day. What she discovers in these exams is extraordinary, and revealing of the life that person lead.

Understand how someone is diagnosed with CTE post-mortem, and the intricate details of brain examinations with host Kathryn Fox; as she chats with Victorian Institute of Forensic Medicine's Dr Linda Iles.

Crime Insiders executive producer Dan Mullins presents a look back at one of our earlier episodes.

For more information on CTE or if anyone you know is showing symptoms and you need support, visit the following resources:

https://www.concussionfoundation.com.au/helpline

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A young cop in England realises whilst chasing a suspect with a rifle that his life will never be the same again. It lead to infiltrating football hooligans as a 17-stone skinhead.

Garry Rogers QPM is a former undercover operative who served 30 years with the Greater Manchester Police.

Garry played a key role in one of the UK's most successful undercover policing operations, targeting the football hooliganism that blighted the domestic and international game. The undercover operation was so successful, that the GMP extended the operation to target serious and violent crime, and it was Garry who gained the trust of armed robbers, drug dealers, and a murderer.

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

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Taskforce Argos was built to catch the worst of the worst - to infiltrate and stop child exploitation material networks.

Its former head, Jon Rouse spent years in the operation, and became entrenched in the world of saving children from abuse and sexual exploitation. Now, he's got some distance from the front-line, but, questions still linger. How does it all affect him? And what is he doing now after leaving the force?

Unpack the incredible career, and the merciless work that Jon Rouse and the team at Taskforce Argos undertook, with host Brent Sanders. From analysing the most disturbing of images, to infiltrating online networks and executing raids. As many heard in the award winning podcast series The Children in the Pictures, Jon's work took him across borders, and down dark roads. Hear him explain the work and the toll it takes on this episodes of Crime Insiders: Detectives.

This episode contains references to child sexual abuse and child exploitation material - please listen with care.

If anyone you know has been affected by this material or you've been affected yourself, please reference the following resources:

https://www.afp.gov.au/what-we-do/operational-support/australian-centre-counter-child-exploitation

See omnystudio.com/listener for privacy information.