The Lab Detective | Tortoise Investigates

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Introducing...The Lab Detective

Kathleen Folbigg experienced unimaginable loss. All four of her infant children died suddenly, over a 10-year period. Their deaths were unexplained. Until a police detective turned up at her door, and arrested Kathleen on suspicion of murder. 

She was labelled ‘Australia's worst female serial killer’, convicted, and was destined to spend most of the rest of her life in jail. 

Until a different type of detective entered her life. A scientist working in a lab who uncovered the truth behind the deaths. 

This is the story of a shocking miscarriage of justice, but as journalist Rachel Sylvester starts to investigate how this happened, she learns that Kathleen is not alone – other mothers have endured the same fate, and may also be in prison. 

The Lab Detective is a story about the power of science, and the determination of those searching for the truth.

Episodes 1 and 2 will be available to listen on 22nd July.

To listen to the full series on 22nd July, subscribe to TheObserver+ on Apple Podcasts and Spotify or download the Tortoise app.

Reporters: Rachel Sylvester 

Producer: Gary Marshall

Executive editor: Basia Cummings 

Music supervisor: Karla Patella 

Sound design: Rowan Bishop 

Artwork: Lola Williams 

Fact checking: Ada Barume and Madeline Parr

To find out more about The Observer:

Subscribe to TheObserver+ on Apple Podcasts for early access and ad-free content

Head to our website observer.co.uk 

Download the Tortoise app – for a listening experience curated by our journalists

If you want to get in touch with us directly about a story, or tell us more about the stories you want to hear about contact [email protected]

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• No. of episodes: 99
• Latest episode: 2025-07-15
• Society & Culture News Documentary News Commentary

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