You asked, and now we can finally unpack the controversial undercover operation that police used to pursue Steve Fabriczy — a 'Mr Big' sting.

In this episode, Elizabeth Byrne and ABC Unravel reporter Alicia Bridges explain how the method works, its weaknesses, and why it has faced restrictions in other countries.

If you have any questions you'd like Liz, and Stocky to answer in future episodes, please email thecaseof@abc.net.au.

The Case Of is the follow-up to the hit podcast Mushroom Case Daily, and all episodes of that show will remain available in the back catalogue of The Case Of.