When suburban mum Kerry Tucker decided she should start hitting the gym, she didn’t expect to be arrested a month later. For more than six years, Kerry had stolen two million dollars from her employer. 

In this episode, Kerry takes us inside the first 24 hours inside a women’s maximum security prison as a ‘cleanskin’, where she was locked up with some of Australia’s most infamous female criminals.

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In this second part of I Catch Killers, Gary and Rojé delve deep into the chilling psyche of Katherine Knight—the only woman in Australia sentenced to life in prison without the possibility of parole.

What drives a person to commit the unthinkable? They explore the gruesome crime scene that shocked even the most veteran homicide detectives, the calculation behind the skinning and butchering of John Price, and the psychological "triggers" that Katherine used to justify her actions.

Gary and Rojé break down the terrifying final 24 hours of John Price's life, the warning signs that were missed, and the "nature vs. nurture" debate surrounding Knight’s fraternal twin sister. This is a gritty look into a real-life horror story and the long-term impact such extreme cases have on the detectives and communities left in their wake.

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What Katherine Knight did to her partner John Price wasn't just murder, it was something far more twisted. Katherine was a woman consumed by two things: a crippling fear of abandonment, and an insatiable need for control, enforced through violence, manipulation, and sexual exploitation. Most Australians know the horror of how John Price died. What they don't know is the decades-long history of abuse Katherine inflicted on the men in her life, and anyone else she deemed an obstacle. Which raises an uncomfortable question, if a man had done to women what Katherine did to men, would he have been stopped years earlier?

In this episode of I Catch Killers, Gary Jubelin is joined by Rojé Augustin, whose new book The Butcher of Aberdeen, delves into Katherine’s chilling past shaped by childhood trauma, violent relationships, and a relentless descent into madness.

Rojé Augustin is the author of The Butcher of Aberdeen: An Australian Story of Sex, Madness, and Murder.

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Veteran journalist and author Neil Mercer returns to I Catch Killers for part two of his confronting examination of wrongful convictions in the Australian justice system. 

In this episode, Neil and Gary Jubelin revisit one of the most embarrassing periods in NSW Police history: the case of Harry Blackburn, a former police superintendent publicly branded a serial rapist and paraded before the media before he was ever formally charged. They unravel the extraordinary chain of failures that led to his very public downfall, a saga that only ended when a Royal Commission finally exposed the truth. 

They also unpack DNA evidence, long considered the gold standard in forensic science, and just how far from infallible it can be, and the broader, systemic issues that allow innocent people to be wrongly convicted: unreliable eyewitness identification, the historical use of "police verbals" and false confessions, inadequate legal representation, and the unique challenges faced by First Nations Australians navigating a justice system not built with their language or culture in mind.

Neil Mercer is the author of Falsely Convicted: True Stories of Injustice in Australia. 

Want to hear more from Neil Mercer? Listen to his other interviews with Gary on I Catch Killers here and here. 

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What happens when the justice system gets it catastrophically wrong? Neil Mercer has spent over five decades as a journalist unafraid of the hard stories, as evidenced in his latest book Falsely Convicted. 

In this episode, Neil joins Gary to unpack two of Australia's most shocking miscarriages of justice. First, the wrongful conviction of schoolteacher Josephine Greensill, whose life was torn apart by allegations from two former students dredged up from three decades earlier. Then, the case of Andrew Mallard, who was wrongfully convicted for the 1994 murder of Perth shopkeeper Pamela Lawrence. Gary also shares a confronting personal account from his early career as a detective, illustrating how difficult it can be to halt the "machinery of the justice system" once it's in motion, even when doubts about guilt begin to surface.

Neil Mercer is the author of Falsely Convicted: True Stories of Injustice in Australia. 

Want to hear more from Neil Mercer? Listen to his other interviews with Gary on I Catch Killers here and here. 

You can watch I Catch Killers on Youtube here. 

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In the gripping second part of Gary Jubelin’s conversation with former undercover operative Todd Maguire, the stakes reach a breaking point. Todd delves deeper into the psychological toll of maintaining multiple false identities, where the line between his real self and his undercover personas began to dangerously blur.

From terrifying rural setups involving illegal firearms and rust-covered blades to the high-stakes world of city underbelly operations, Todd reveals the raw reality of life in the field. He shares the harrowing moment he truly thought his cover was blown and how a reckless descent into alcohol and substance abuse became his only way to cope with the trauma he couldn't process.

Gary and Todd also discuss the profound personal cost of the job, the "tick and flick" approach to officer welfare, and the life-changing wakeup call that finally forced Todd to confront the train wreck his life had become.

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At just 25 years of age, Queensland police officer Todd Maguire woke up to discover the love of his life had taken her own life. Shattered and searching for a way to escape the pain, Todd threw himself into the dangerous world of undercover policing, and became someone else entirely.

Enter Donny: reckless, fearless, and fully immersed in a criminal underworld of drugs, violence, and volatility, where one wrong word or one wrong look could get you killed.  

In this episode of I Catch Killers, Gary Jubelin sits down with Todd to unpack a story of profound loss, reinvention, and survival. Todd opens up about the moment he found his partner's body, the brutal reality of life undercover, and how deeply he lost himself in his alter ego.

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In this continuation of their deep dive, Gary Jubelin speaks with former Western Australian police diver Luke McCulloch about the harrowing reality of underwater investigations. Luke details the psychological and physical demands of searching for evidence and recovering bodies in "deep, dark, and dirty" conditions—from murky riverbeds to the open ocean.

Luke shares the terrifying experience of working in shark-infested waters and explains why the "touch and feel" of a recovery operation never truly leaves you. They explore the professionalism required to operate in high-stakes environments and the emotional toll of a career spent finding what no one else wants to find.

In this episode:

• The reality of body recovery in zero-visibility environments.
• The dangers of diving with Great White sharks.
• The intense selection process and resilience required to be a police diver.
• The lifelong impact of "deep, dark, and dirty" operations.

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What does it take to hunt a predator in the dark? In this episode of I Catch Killers, Gary Jubelin sits down with Luke McCulloch, a former police diver and officer whose career was defined by the motto: Profundus, Obscurus, Suridus - Deep, Dark, and Dirty.

Luke recounts the chilling moment a routine traffic stop for a motorbike with no headlights led to a major breakthrough in the hunt for the notorious West Perth Rapist. From his early days as the youngest sworn officer in Western Australia to the gruelling selection process of the police dive squad, Luke shares the reality of life on the thin blue line.

Dive into the psychological and physical challenges of policing in the "Wild West," the importance of de-escalation, and the split-second decisions that can lead to solving a high-pressure case.

In this episode, we discuss:

-The traffic stop that caught Steven Michael Adams (The West Perth rapist).

-Luke's experience patrolling the remote Pilbara and the unique challenges of country policing.

-The intense, hypothermia-inducing training required to become a police diver.

-What it’s really like searching for evidence and bodies in pitch-black water using nothing but touch.

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Loved ones of missing people are desperate for answers, and unfortunately there are people more than happy to exploit their despair for their own gain.

In part two of her conversation with Gary Jubelin, missing persons advocate and author Nicole Morris calls out clairvoyants and psychics, exposing the very real trauma caused by false hope. The pair discuss why all missing persons should be treated as homicides until proven otherwise, how dangerous assumptions made early in an investigation can derail justice and leave families without answers for years, and call for better resourcing and a national approach to missing persons investigations.

Nicole is the author of Lost: More True Stories from Families of Australian Missing Persons.

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Every single day, around 130 Australians on average are reported missing. For the families left behind, there are no funerals, no closure, and no answers, just an unbearable silence where a person used to be. Nicole Morris has spent over two decades refusing to let that silence win.

As the founder and director of the Australian Missing Persons Register, Nicole has supported countless families through the devastating trauma of unexplained disappearance. For more than two decades, she has earned the trust of law enforcement agencies and government bodies across Australia and internationally through her relentless commitment to ensuring the missing are never forgotten.

In this episode of I Catch Killers, Gary and Nicole break down the human cost of disappearance, what it truly means to live with an "ambiguous loss", and share the stories of families whose lives have been irrevocably changed by unanswered questions.

Gary and Nicole also take a hard look at the system. Why does the first response to a missing persons report matter so much? What goes wrong when cases aren't treated with urgency? And why does the dangerous myth that you must wait 24 hours before reporting someone missing continue to cost precious time?

Nicole is the author of Lost: More True Stories from Families of Australian Missing Persons.

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