Could a 1978 cold case buried in a file cabinet outlast Phillip Hughes' prison sentence? That is the ticking clock driving A Devil in the Valley, a true crime audiobook from Paul Holes, the retired Contra Costa County investigator best known for the DNA and genetic genealogy work that helped identify the Golden State Killer in 2018. In 1994, with the Golden State Killer case still stalled waiting for the science to catch up, Holes pulls a different cold file: the 1978 murder of a mother killed during a morning jog, a case originally pinned on serial killer Phillip Hughes without enough proof to charge him.
Hughes is heading toward a parole hearing, and Holes commits to closing the case before that hearing arrives, both for the victim's family and as leverage to force a fuller confession out of Hughes for whatever else he may have done. What starts as a single-case investigation widens, per the synopsis, into 'other cases and killers he never knew about,' revealing that Contra Costa County's small towns held a darker history than anyone realized at the time.
The Golden State Killer case Holes set aside to pursue this 1978 file is itself one of the most significant true crime investigations of the past decade: investigators used public genetic genealogy databases, cross-referencing crime-scene DNA against family trees built from consumer ancestry sites, to finally identify Joseph James DeAngelo in 2018, a method that has since reshaped how cold cases nationwide get approached.
Contra Costa County sits in the East Bay, across the water from San Francisco, and the synopsis's description of its small towns holding 'a more sinister history than anyone had imagined' plays against the region's otherwise unremarkable suburban reputation, part of what makes cold-case true crime set here distinct from the higher-profile urban settings true crime more often favors.
What Works
The parole deadline gives the narrative real forward momentum, a structural choice that turns a decades-old cold case into something closer to a countdown than a retrospective. Listeners who followed Holes' Golden State Killer work, or read his prior full-career memoir, will recognize his methodical, DNA-forward investigative style here, applied to a single case rather than spread across an entire career.
Narrator Jim Clemente is a retired FBI profiler with his own true crime writing and consulting credentials, a genre-appropriate pairing for material built around cold-case forensic reasoning, though no listener reviews are attached yet to confirm how that pairing plays out in performance specifically. The case itself, told through Holes' own procedural lens, gives Clemente plenty of methodical, evidence-driven material to work with rather than pure courtroom drama.
That same genealogical, evidence-first mindset carries over into how Holes describes approaching the 1978 case here, treating an old file cabinet's contents as genuinely solvable rather than permanently cold, provided the right combination of patience and modern forensic technique gets applied to decades-old evidence.
The leverage strategy driving the back half of the investigation, solving one case specifically to pressure a subject already facing consequences elsewhere into confessing to others, is a real and recognizable cold-case technique, and watching Holes build toward that specific goal gives the book a clear strategic throughline beyond simply solving one murder.
The gap between 1994, when DNA testing existed but genetic genealogy databases did not, and the technology that eventually cracked the Golden State Killer case decades later is itself part of the story here: Holes spent years working cases the forensic science of his own era simply could not yet close.
Before You Commit to A Devil in the Valley
No listener reviews are attached to this title yet, and only two ratings currently back the 4.0 average, both signs that this is a newer or lower-visibility release than Holes' full memoir. That thinness makes the case for evaluating the book on Holes' broader reputation and the strength of the case narrative itself rather than crowd-sourced reception.
At four hours and thirty-six minutes, this audiobook is considerably shorter than his previous full-career memoir, and listeners should read that runtime as a feature rather than a defect: this is a tightly focused single-case account, not a sweeping retrospective, and the compact length matches its narrower scope rather than signaling an abridged edition of something longer.
Cold case work of this kind carries a real emotional cost that career investigators like Holes have spoken about candidly elsewhere: sitting with unsolved violence for years, sometimes decades, and carrying a victim's family's hope for resolution personally. That weight is worth expecting here even within a relatively short runtime, since the book's focus stays tightly on one family's decades-long wait for an answer.
The victim's family gets real weight in how the synopsis frames the case, the victim's family needs an answer, rather than treating the 1978 murder purely as an intellectual puzzle for Holes to solve, which keeps the human stakes present even during the more procedural, evidence-focused stretches of the investigation.
Who It's For
True crime listeners who already know Holes from his Golden State Killer work, from his podcast appearances, or from his full-career memoir are the clear audience, and this narrower case study rewards that existing familiarity with a tighter, more focused version of his investigative style. Fans of cold-case-forensics-driven true crime generally, rather than sensationalized courtroom drama, will find the procedural detail satisfying.
Listeners wanting the full sweep of Holes' career, including the Golden State Killer investigation itself in complete detail, should reach for his earlier memoir instead; this title covers one specific 1978 case and its unexpected aftermath rather than a career retrospective. For anyone wanting a compact, tightly wound true crime audiobook built around a real parole deadline, this one delivers exactly that.
Listeners new to Holes' work entirely, without prior exposure to the Golden State Killer coverage, can still follow this narrower case on its own terms, since the synopsis lays out the central 1978 investigation clearly without assuming outside knowledge.
- Read by: Jim Clemente, a retired FBI profiler, is a genre-appropriate pairing for methodical, forensics-driven true crime, though no reviews yet confirm the performance itself.
- At its heart: Cold case investigation, genetic genealogy, parole-deadline urgency.
- Vibe: Methodical, tense, procedurally focused.
- Short version: A tightly wound single-case true crime audiobook, best for listeners already familiar with Paul Holes' investigative reputation.
Common Questions
How long is the A Devil in the Valley audiobook?
Four hours and thirty-six minutes, considerably shorter than a full career memoir because it stays tightly focused on one specific case and its aftermath.
Does this audiobook reveal whether Phillip Hughes is convicted for the 1978 murder?
The synopsis frames the investigation as a race against Hughes' parole hearing without spoiling the outcome, so listeners should go in expecting a genuine procedural unfolding rather than a foregone conclusion.
Are there listener reviews yet for this audiobook?
None are attached to the listing at the time of this review, so it is worth evaluating based on Paul Holes' broader investigative reputation and the case narrative itself rather than crowd reception.
