On the evening of 29 December 2011, the police officer Clifton Lewis was moonlighting as a security guard at a Chicago minimart when two men walked in. They shot Lewis several times, then took off with his gun and police star. A week later, officers had their suspects: four men affiliated with a gang called the Spanish Cobras. For hours, under intense police questioning, they all said they didn’t do it. That didn’t seem to matter. This is episode one of Off Duty, an investigation by the Guardian’s Melissa Segura

The Free Birth Society was selling pregnant women a simple message. They could exit the medical system and take back their power. By free birthing. But Nicole Garrison believes FBS ideology nearly cost her her life. This is episode one of a year-long investigation by Guardian journalists Sirin Kale and Lucy Osborne Listen to the full series from The Guardian Investigates podcast

Three years ago British journalist Dom Phillips and Brazilian indigenous defender Bruno Pereira vanished while on a reporting trip near Brazil’s remote Javari valley. The Guardian’s Latin America correspondent Tom Phillips investigates what happened in the first episode of a new six-part investigative podcast series. Find episode 2 – and all future episodes – by searching for “Missing in the Amazon”

We wanted to bring you this episode from our new series, Black Box. In it, Michael Safi explores seven stories and the thread that ties them together: artificial intelligence. In this prologue, Hannah (not her real name) has met Noah and he has changed her life for the better. So why does she have concerns about him? If you like what you hear, make sure to search and subscribe to Black Box, with new episodes every Monday and Thursday.

We wanted to tell you about another Guardian podcast series from our colleagues in Australia. Australia’s most decorated living soldier, Ben Roberts-Smith, is suing three of the country’s most trusted newspapers for defamation over articles he says falsely accuse him of war crimes. Whatever the outcome, the ramifications will be immense for public interest journalism, Australia’s military and a man venerated as a modern-day war hero. Search for ‘Ben Roberts-Smith v the media’, wherever you get your podcasts

Guardian producer Lucy Hough and reporter Matthew Weaver give an update on the outcome of Matthew Hardy’s appeal

As the years tick by, journalist Sirin Kale speaks to victims and those who know Matthew to ask whether his stalking will ever truly end

Journalist Sirin Kale meets Matthew’s mother to uncover more about his past, and find out what might have motivated him to cyberstalk his victims for so many years

Matthew’s victims come face to face with him as an attempt is made to stop his torment once and for all

Who is Matthew? Journalist Sirin Kale looks for clues about who this cyberstalker really is and why he creates chaos and fear in so many people’s lives

As the cyberstalker spreads his net wider, anyone could be a target. The fast-changing world of social media creates new opportunities for him to find more victims. Only now, someone is watching him …