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Precision & Instinct

Precision & Instinct

Written by: Simone Valdez and Eli Marchetti
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Every case has a body, a mystery, and no confession.

Precision and Instinct is a true crime debate show built around two hosts who never agree. Eli Marchetti argues the hard evidence — what can actually be proven. Simone Valdez argues the pattern — what the evidence is too careful to say out loud. There is no narrator telling you what to think, and no tidy resolution. Just two sides of every case, argued out in full, and you decide who is right.

Each episode takes on a real, unresolved case — from an unidentified man found dead on an Australian beach with a coded poem in his pocket, to the real exorcism that inspired a horror classic, to the oldest unsolved murder in Los Angeles history. Every case gets the same treatment: hard evidence versus pattern and instinct, argued out completely, no verdict handed to you.

New episodes weekly.

SIMONE VALDEZ grew up two blocks from the water in Santa Barbara, in a family of storytellers who trusted their gut long before they trusted the news. Her grandmother read coffee grounds; her mother ran a small business on instinct alone and never once went under. Simone inherited both the skepticism of outsiders and the conviction that some truths show up in a room before they show up on paper. She spent her twenties as a behavioral researcher, then a private investigator's assistant, chasing the parts of a case that never made it into the official report — the pause before an answer, the detail nobody thought to ask about. She has an unshakeable belief that people tell you who they are, if you're willing to actually watch. Precision and Instinct lets her finally say out loud what she's been thinking the whole time.

ELI MARCHETTI was raised in a house where dinner conversations doubled as cross-examinations. The son of a Cook County paralegal and a high school chemistry teacher, he spent his childhood summers on the South Side of Chicago, where he learned early that a good story and a true one are rarely the same thing. He studied journalism before switching, halfway through, to statistics — a decision his mother still brings up. Before turning his attention to cold cases and unsolved mysteries, Eli spent the better part of a decade fact-checking for a Midwest newsroom, where he developed a reputation for being the last person in the building willing to sign off on a headline. He now lives by one rule: if it can't be documented, it isn't true yet — it's just a good guess wearing a suit. Precision and Instinct is his first venture into audio, though friends say he's been cross-examining people for free his whole life.

Precision & Instinct 2026
True Crime
Episodes
  • The Hall-Mills Murders: Jersey’s Original True Crime Circus
    Oct 11 2026

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    On a September night in 1922, a small-town minister and a choir singer he'd been having an affair with were shot dead and laid out side by side under a crab apple tree in a New Jersey lovers' lane — his hat over his face, her scarf around her throat, torn love letters scattered between them, and his own calling card propped at his feet like a signature. The crime scene was never secured: within days it was pulling an estimated thousand cars a day, with vendors selling balloons and twenty-five-cent bags of dirt scooped from under the tree until souvenir hunters had stripped the bark off it. Four years, a missing grand jury file, and a witness testifying from a hospital bed later, the reverend's widow and her two brothers stood trial in the biggest media circus American journalism had seen before Lindbergh — and walked out acquitted. This week, Eli makes the case that the acquittal was the only honest verdict a badly-compromised, circumstantial case could produce. Simone isn't ready to let a filed-down pistol, a changed story, and a family with the money to buy the best defense in the state off the hook that easily.

    Want to see for yourself? The case file has the full story in writing, and the source list shows which claims are confirmed, which are disputed, and which rest on a single account.

    Case file: https://precisionandinstinct.com/cases/hall-mills-murders/

    Source list: https://notes.precisionandinstinct.com/episodes/14-the-hall-mills-murders.html

    CONTENT NOTE: This episode covers a real, unsolved 1922 double homicide and the 1926 trial of four named historical defendants — Frances Hall, Henry Stevens, Willie Stevens, and Henry Carpender — all of whom were acquitted or never brought to trial and were never legally found guilty of anything. All named principals in this case, including both victims and the prosecution's central witness, died between 1930 and 1992; there are no living subjects and no sensitivity sign-off gate on this case. Standard care applies throughout to any language implying guilt, since the jury's verdict stands and has never been overturned — the episode itself argues both sides without resolving which one is right.

    The hosts are characters created by Verb Editorial. Their voices are AI-generated. All research, writing and production are done by a human team.

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    14 mins
  • The Mad Gasser of Mattoon
    Oct 4 2026

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    EPISODE 13: The Mad Gasser of Mattoon (Mattoon, Illinois, September 1944)

    EPISODE NOTES:

    In September 1944, in the small Illinois railroad town of Mattoon, a woman named Beulah Cordes picked up a cloth left on her own front porch — and within seconds her lips were swelling and her mouth and throat were burning, with a skeleton key and a lipstick tube, neither hers, sitting beside it. Over the next two weeks, dozens of residents reported a mysterious "gas maniac" breaking into homes at night to leave people gassed and paralyzed, drawing in the Illinois State Police and the FBI, before the panic collapsed within days of the police chief publicly doubting it — and no suspect was ever arrested or charged. This week, Eli and Simone dig into a case the town's own public health commissioner couldn't fully settle in real time: whether this is one of history's clearest documented cases of mass hysteria, or whether one badly-explained porch means something in Mattoon actually happened.

    CONTENT NOTE: This episode discusses a wartime panic involving documented chemical injury to a real, named private individual (Beulah Cordes) and references to wartime loss (a household member killed at Normandy) as historical context, not as a focus of grief or tragedy narration. One contested historical candidate (Farley Llewellyn) is named once, sourced to a single self-published book flagged as unreliable by Wikipedia's own editors; no motive, personal life, or biographical detail about him is discussed. No suspect was ever arrested or charged in this case, and it remains officially unresolved.

    You'll find the source list here: https://verbeditorial.github.io/precision-and-instinct-notes/episodes/13-the-mad-gasser-of-mattoon.html

    The hosts' voices in this episode are AI-generated. All research, writing, and production are done by a human team.

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    17 mins
  • Spy in a Bag: The Death of Gareth Williams
    Sep 27 2026

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    In August 2010, a 31-year-old GCHQ mathematician on secondment to MI6 vanished for over a week without anyone at his own intelligence agency raising an alarm. When police finally checked his Pimlico flat, they found him dead inside a padlocked holdall bag in the bathtub. What followed was a 2012 coroner's inquest that found it "likely" he was unlawfully killed — and a 2013 Metropolitan Police reversal calling it "probably an accident." Neither has ever been proven. No one has ever been charged. As of a 2023 forensic review, the file remains officially open. This week, Eli and Simone dig into a case where two of Britain's own institutions reached opposite conclusions from the same evidence, and neither has ever closed the book.

    CONTENT NOTE: This episode discusses an unresolved death that remains an open case; Gareth Williams's family has publicly and repeatedly disputed the official "accident" finding as recently as 2013. The episode also discusses aspects of Williams's private life (a fashion-course enrollment, a wardrobe of women's clothing, and visits to bondage-related websites) strictly within the framing the coroner herself established at inquest — this is not tabloid speculation, and neither host draws conclusions about his sexuality or private life beyond what the official record supports. Neither host reaches a verdict on whether Williams was unlawfully killed or died by accident; the case remains genuinely unresolved.

    You'll find the source list here: https://verbeditorial.github.io/precision-and-instinct-notes/episodes/12-the-death-of-gareth-williams.html

    The hosts' voices in this episode are AI-generated. All research, writing, and production are done by a human team.

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    15 mins
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