Civilian Sleuths

Alethea
  • 5.0 (2)
  • True Crime
  • Biweekly

Civilian Sleuths is a new investigative podcast shining a forensic light on Australia’s most challenging unsolved murders and missing persons cases. For decades, these crimes have haunted families, investigators, and communities searching for answers—not for lack of effort, but because the tools of the past were limited. Using original source material, coronial records, archived media, and modern analytical tools, Civilian Sleuths recreates timelines, re-examines evidence, and explores theories that may have been overlooked for decades. But the most powerful tool remains public memory. Behind every cold case is a real person. A family. A life interrupted. And often, someone who still knows the truth. If you know something—no matter how small—it may matter. Launching January 6 with new episodes every second Tuesday, Civilian Sleuths invites you to become part of the investigation. Unsolved. Unforgotten. Unfinished. Listener discretion advised.

  1. 5d ago ·  Bonus

    Denise McGregor: Series Update 1

    Nearly fifty years after Denise McGregor was murdered, new accounts have surfaced about a practice remembered from Melbourne’s northern suburbs in the 1970s. People who lived there at the time have described it by names including “root or walk” and “no root, no ride.” Teenage boys and young men would drive girls to isolated places, then make getting home conditional on sex. There is no evidence that this is what happened to Denise, and we do not claim that it was. But it raises a question that has never gone away: How did Denise get from Pascoe Vale to Merriang Road, Wallan East? And could memories from that world — memories nobody ever thought had anything to do with Denise — still help answer it? If you were a teenager or young adult in Melbourne’s northern suburbs in the 1970s, I want to hear what you actually remember. Did you hear those terms? Was there another name for the same practice? Where were girls taken? Which roads, reserves, paddocks, lookouts or other isolated places were known for it? Who talked about it? Was it associated with particular suburbs, friendship groups, cars, bikes or meeting places? You do not need to have information about Denise’s murder to get in touch. You do not need a theory about who killed her. And if something like this happened to you, you do not need to disclose your own experience in order to tell me what you remember about the world around it. If you remember this practice, the language used for it, or the places associated with it, please contact Civilian Sleuths . If you have information that may directly relate to Denise McGregor’s disappearance or murder, contact Victoria Police or Crime Stoppers. For some men, speaking now may mean confronting conduct they have spent decades minimising. For some women, it may mean recognising that what happened to them was sexual assault. Neither means they know who killed Denise. But what they remember could still matter. Denise was just a kid. She’s owed a name. And her family are owed an answer. Content warning: This episode discusses sexual violence and coercive sexual behaviour. Sexual Assault Crisis Line Victoria: 1800 806 292 1800RESPECT: 1800 737 732

    Denise McGregor: Series Update 1

  2. Oct 13

    Margaret & Seana Tapp: Someone Knows A Double Murderer (FINALE)

    Forty-two years later, the answer may still exist in one of two places: in the evidence collected in 1984 — or in the memory of someone who has not told everything they know. That is where this series ends. What survives from 13 Kelvin Drive? What could modern forensic science still reveal? And how much did the laboratory contamination that derailed the case in 2008 actually affect? Then there are the questions science cannot answer. A bright red utility seen in Kelvin Drive was never publicly traced. A caller who contacted police decades later never rang back. And somewhere, someone may still remember the detail that finally gives this case what it has never had. A name. Six episodes have taken the murders of Margaret and Seana Tapp as far as the documents can carry them. Now there are only two things left that could move this case. A laboratory. Or a person.

    Margaret & Seana Tapp: Someone Knows A Double Murderer (FINALE)

  3. Sep 28

    Margaret & Seana Tapp: Was Margaret His Target?

    For forty-two years, the murders of Margaret and Seana Tapp have been read through Margaret. Her relationships. The men in her life. The assumption that whoever entered that house came for her. But what if that assumption is wrong? Seana was sexually assaulted. There was no evidence Margaret was. And four crucial things were never determined: when they died, where in the house they died, what was used to strangle them, and the order in which any of it happened.  In this episode, we take ten scenarios the surviving record permits and test each one against the evidence. Nothing can be eliminated outright. But not every explanation costs the same.  Some begin with Margaret. Others do not. The question is not which story sounds neatest, but what each one requires us to assume — and whether anything in the evidence actually distinguishes between them. The one specific thing the record establishes about what at least one offender wanted, it establishes about Seana. Every version of that night built around her mother has to account for how it got there. Was Margaret really the target — or has the case been asking the wrong question for forty-two years?

    Margaret & Seana Tapp: Was Margaret His Target?

  4. Sep 14

    Margaret & Seana Tapp: A Stranger, or Someone She Knew?

    No broken lock. No forced window. Nothing stolen. Whoever murdered Margaret and Seana Tapp entered their home without leaving any clear sign of how—or why. Police worked through hundreds of people connected to their lives. Friends. Family. Neighbours. The men closest to Margaret. But one potentially vital figure remained beyond their reach: the unknown driver of a red Ford utility seen twice in Kelvin Drive that evening. For forty-two years, the absence of forced entry has fuelled one persistent assumption: Margaret must have known her killer. But the house had another entrance. And when the bodies were found, it was unlocked. Did Margaret admit a familiar face—or did a stranger simply try the right door?

    Margaret & Seana Tapp: A Stranger, or Someone She Knew?

  5. Sep 1

    Margaret & Seana Tapp: A Name, Then an Apology

    After twenty-four years, science produced a name. Two weeks later, science took it back. In August 1984, Margaret Tapp and her nine-year-old daughter Seana were murdered in their home in Ferntree Gully, in Melbourne's outer east. There was no obvious sign of forced entry. Eleven sealed bags of evidence went to the State Forensic Science Laboratory, and the case has never been solved. We went back to the original Victoria Police brief of evidence — the post-mortem reports, the laboratory findings and the 1986 inquest — and set them against what has been said about this case for forty years. Some of the most repeated details are not what the original records actually say.  What the evidence did contain was disturbing enough: blood that could be grouped but not identified, four hairs that could not be attributed to either victim, shoe impressions that did not match the shoes in the house, fibres with no known source — and biological evidence, left on Seana's clothing, that the laboratory could not individualise.  Then, in July 2008, a DNA profile obtained from Seana's clothing matched a name on the national database. Victoria Police charged a man with both murders. Two weeks later, the charges were withdrawn. The evidence had been contaminated in a laboratory nine years earlier. The match had never validly connected him to these crimes. What the science could establish. What it never could. And what forty years of retelling added that was never established at all. Content warning: this episode discusses the murder of a mother and child, child sexual assault, autopsy findings and biological evidence.

    Margaret & Seana Tapp: A Name, Then an Apology

  6. Aug 17

    Margaret & Seana Tapp: He Pulled The Covers Up

    A whole street saw the drawn blinds — and not one person knew that behind them, a mother and her nine-year-old daughter lay murdered in their beds. For almost a full day, no one knocked. Neighbours walked past. Children went to school. A friend left a note at the door and drove away. And the killer used every hour of it — a full day's head start before anyone even called police. When they finally got inside the Ferntree Gully home on the 8th of August 1984, they found Margaret Tapp, 35, and her little girl Seana, just 9 years old, both strangled. No broken window. No forced door. Whoever did this was let in, or knew the house well enough not to need to be. He took nothing. He left almost nothing. And before he walked out, he pulled the covers up over them, so it would look like they were sleeping. Forty-two years later, no one has ever been charged. Content warning: discusses the murder of a mother and child and the sexual assault of a minor.

    Margaret & Seana Tapp: He Pulled The Covers Up

  7. Aug 3

    Margaret & Seana Tapp: The Blinds Stayed Drawn

    For almost a day, everyone who looked at 13 Kelvin Drive found an ordinary explanation. Inside, Margaret and Seana Tapp were already dead. On Tuesday 7 August 1984, Margaret was studying for her law degree while her nine-year-old daughter rode her bike in the fading winter light. There were phone calls about babysitting and the September school holidays. A neighbour saw Margaret through the loungeroom window. A bright red Ford utility stood out in the street. By Wednesday evening, the blinds remained drawn. Seana had missed school. A friend knocked, assumed Margaret was asleep, and left a note. No one yet understood what had happened inside the house. In the first episode of Series 3, Civilian Sleuths reconstructs the final known hours of Margaret and Seana Tapp, witness by witness, until every ordinary explanation falls away. Someone saw something. Someone knows something. They may not yet realise their memory matters. Content warning: This episode discusses sexual assault and contains descriptions of how the bodies of Margaret and Seana were found.

    Margaret & Seana Tapp: The Blinds Stayed Drawn

  8. Season 3 Trailer

    Margaret & Seana Tapp - Series 3 Trailer (1984)

    For almost a day, no one realised anything was wrong. A neighbour assumed Margaret was sleeping after studying. A schoolfriend noticed Seana wasn't at school. Inside their home on Kelvin Drive, a mother and her nine-year-old daughter were already dead. On a winter night in August 1984, Margaret Tapp - a 35-year-old nurse, single mother of two and law student - and her nine-year-old daughter Seana were murdered inside their home in Ferntree Gully, at the foot of the Dandenongs. Margaret had arranged a babysitter, confirmed a date for the opera the following evening, and had been seen through her front window studying. Sometime after dark, someone came to the house. A red utility was seen parked in the street that night and was never traced. Their bodies were discovered nearly a day later, when Margaret's date let himself into the house through a sliding door at the rear. More than two decades later, a DNA breakthrough led to charges, but the evidence ultimately collapsed because of laboratory contamination. More than four decades later, the murders remain unsolved. In Civilian Sleuths, we return to the original police brief and the 1986 coronial inquest - witness statements, the timeline and the forensic record - to rebuild Margaret and Seana's final hours from the documents themselves, and to examine what the investigation focused on, and what it may have missed. Episode 1 premieres 4 August. Subscribe now. If you have information about the murders of Margaret and Seana Tapp, contact Crime Stoppers Victoria on 1800 333 000 or submit a confidential report online. Content Warning: This series discusses the murder of a woman and her child in their home. Listener discretion is advised.

    Margaret & Seana Tapp - Series 3 Trailer (1984)
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Trailers

Ratings & Reviews

5
out of 5
2 Ratings

About

Civilian Sleuths is a new investigative podcast shining a forensic light on Australia’s most challenging unsolved murders and missing persons cases. For decades, these crimes have haunted families, investigators, and communities searching for answers—not for lack of effort, but because the tools of the past were limited. Using original source material, coronial records, archived media, and modern analytical tools, Civilian Sleuths recreates timelines, re-examines evidence, and explores theories that may have been overlooked for decades. But the most powerful tool remains public memory. Behind every cold case is a real person. A family. A life interrupted. And often, someone who still knows the truth. If you know something—no matter how small—it may matter. Launching January 6 with new episodes every second Tuesday, Civilian Sleuths invites you to become part of the investigation. Unsolved. Unforgotten. Unfinished. Listener discretion advised.

Information

  • Creator
    Alethea
  • Years Active
    2025 - 2026
  • Episodes
    25
  • Rating
    Explicit
  • Copyright
    © 2026 Civilian Sleuths
  • Show Website
    Civilian Sleuths

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