What drives lone actors to carry out mass casualty attacks? And could understanding them be the key to preventing the next tragedy? This week, Forensic Psychologist Dr Nathan Brooks joins Tim & Xanthe to unpack the research in his new book -  ‘Mass Casualty: The Rise of Lone Actors’ - exposing surprising truths behind their motives and methods. From hidden warning signs to chilling case studies, he dissects what really sets these individuals apart.

What drives lone actors to carry out mass casualty attacks? And could understanding them be the key to preventing the next tragedy?&nbsp;This week, Forensic Psychologist Dr Nathan Brooks joins Tim &amp; Xanthe to unpack the research in his new book -&nbsp; &lsquo;Mass Casualty: The Rise of Lone Actors&rsquo; - exposing surprising truths behind their motives and methods. From hidden warning signs to chilling case studies, he dissects what really sets these individuals apart.

Motive & Method is an expert-led Australian true crime podcast. Join Dr Xanthe Mallett and criminal psychologist Tim Watson-Munro as they unpack what really makes the offenders behind some of history’s most notorious cases tick, and also react and unpack crimes as they hit the headlines. You will also hear from victim survivors, investigators and advocates for change analysing motive, and method.

Motive &amp; Method is an expert-led Australian true crime podcast. Join Dr Xanthe Mallett and criminal psychologist Tim Watson-Munro as they unpack what really makes the offenders behind some of history’s most notorious cases tick, and also react and unpack crimes as they hit the headlines. You will also hear from victim survivors, investigators and advocates for change analysing motive, and method.

Motive & Method

The Rise of Lone Actors with Dr Nathan Brooks

Six deaths, multiple states and a high-IQ cult at the centre of it all. In this episode Xanthe and Tim unravel the bizarre and deeply unsettling case of 'The Zizians', whose alleged victims include a border patrol agent and one member's own parents. So how and why did a group of highly intelligent Silicon Valley overachievers spiral into violence? It's a twisted web authorities are still trying to untangle, with seven cult members currently behind bars awaiting trial.

You can watch our full episodes now on Youtube: click here!

Six deaths, multiple states and a high-IQ cult at the centre of it all. In this episode Xanthe and Tim unravel the bizarre and deeply unsettling case of 'The Zizians', whose alleged victims include a border patrol agent and one member's own parents. So how and why did a group of highly intelligent Silicon Valley overachievers spiral into violence? It's a twisted web authorities are still trying to untangle, with seven cult members currently behind bars awaiting trial.
You can watch our full episodes now on Youtube: <a href="https://www.youtube.com/playlist?list=PL38MvByTHwxKGmkMHyhV8Hf7oAkB8MI06">click here!</a>

Cult On Trial: Who Are The Zizians?

She killed three babies and tried to murder two others. How is Australia's worst female serial killer now living in anonymity within close proximity to young children?
An investigation by A Current Affair reporter Erin Ramsay has thrust the case of Helen Patricia Moore, the so-called killer babysitter, back into the spotlight. Despite serving less than fourteen years for murdering babies in her care, Moore rebuilt her life under a new identity - and was babysitting again.
Plus, a chilling new claim from her own brother raises the possibility she got away with another murder. Erin Ramsay joins us to reveal what she uncovered and the alarming failures meant to protect children.

You can watch A Current Affair stories here:  on Youtube or 9Now

 

She killed three babies and tried to murder two others. How is Australia's worst female serial killer now living in anonymity within close proximity to young children? An investigation by A Current Affair reporter Erin Ramsay has thrust the case of Helen Patricia Moore, the so-called killer babysitter, back into the spotlight. Despite serving less than fourteen years for murdering babies in her care, Moore rebuilt her life under a new identity - and was babysitting again. Plus, a chilling new claim from her own brother raises the possibility she got away with another murder. Erin Ramsay joins us to reveal what she uncovered and the alarming failures meant to protect children.
You can watch A Current Affair stories here:&nbsp; on <a href="https://www.youtube.com/watch?v=5GeMp4Cosuk">Youtube</a> or <a href="https://www.9now.com.au/a-current-affair/season-2026/clip-cmkcbeomp000b0hqoehqg93bx">9Now</a>
&nbsp;

The Killer Babysitter: Living Free & Babysitting Again

Is this another case of wrongful conviction like Kathleen Folbigg?
In this episode, we revisit the case of Lucy Letby, as fresh legal developments continue to reshape how the evidence is being examined. With new inquests announced and ongoing legal processes underway, questions are being raised about expert testimony, systemic failures and whether earlier conclusions still stand. Tim & Xanthe unpack what’s changed, what’s still contested and why this case remains far from settled.

Is this another case of wrongful conviction like Kathleen Folbigg? In this episode, we revisit the case of Lucy Letby,&nbsp;as fresh legal developments continue to reshape how the evidence is being examined. With new inquests announced and ongoing legal processes underway, questions are being raised about expert testimony, systemic failures and whether earlier conclusions still stand. Tim &amp; Xanthe unpack what&rsquo;s changed, what&rsquo;s still contested and why this case remains far from settled.

The Rise of Lone Actors with Dr Nathan Brooks

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