Podcast Summary: The Knife: A True Crime Podcast

Episode: Off Record – Highway Serial Killings

Date: January 22, 2026
Hosts: Hannah Smith & Patia Eaton
Guest: Frank Figliuzzi, Former FBI Assistant Director & Author

Episode Overview

In this gripping episode of The Knife, hosts Hannah Smith and Patia Eaton explore the chilling reality of "Highway Serial Killings"—a phenomenon where a string of murders, largely targeting women involved in sex work, occur along American highways. They dive deep into the origins and impact of the FBI's Highway Serial Killings Initiative (HSK), discuss the real-life cases that propelled its formation, and interview former FBI Assistant Director Frank Figliuzzi, author of Long Haul. The discussion spotlights both the unique advantages truckers have in evading capture and the evolving methods law enforcement is adopting to confront the crisis.

Key Discussion Points & Insights

1. The Real Trope: Serial Killers & Long-Haul Trucking

(02:43–06:03)

• The episode opens with how the trope of “the serial killer truck driver” is, unfortunately, based in truth.
• The FBI’s HSK Initiative specifically investigates killings along highways, due to the mobile and transient nature of the crime—victims are often picked up, killed, and dumped in different jurisdictions, making detection and prosecution challenging.

“There are a lot of serial killers who are attracted to the profession of long haul trucking for a specific reason.”
— Hannah Smith (04:02)

2. The Oklahoma I-40 Murders

(06:03–16:22)

• In 2003, crime analyst Terri Turner connects a string of homicides along I-40, all involving nude, duct-taped bodies of women dumped at truck stops.
• Turner’s determination and analytical skills catalyzed a multi-state investigation, changing the way highway-adjacent murders are investigated.

“The fact that she took this next step… breaks everything wide open and changes kind of how we even investigate crimes next to highways in America.”
— Hannah Smith (07:57)

• The victims, previously only listed as “prostitutes” in reporting, are memorialized by name and background:
  • Sandra Beard (Oklahoma, Sept 2003): 43, devoted mother, involved in survival sex work.
  • Jennifer Hyman (Tennessee, Aug 2003): 24, college student, moonlighting in sex work.
  • Margaret Holmes Gardner (Arkansas, July 2003): 47, advertised services over CB radio.

“That doesn’t mean they don’t deserve to be remembered by name.”
— Hannah Smith (10:47)

• The investigation revealed at least ten similar murders along I-40—and likely more still undetected.

3. Obstacles & Ripple Effects

(12:07–16:22)

• Jurisdictional issues make cross-state cases harder to solve.
• Law enforcement biases often lead to less urgency for cases involving sex workers, compounding the challenge.

“You have a woman who has been duct taped… this is extreme… that’s someone who’s pretty confident by this point.”
— Patia Eaton (08:07)

4. The Investigation Expands & the Birth of HSK

(16:22–27:04)

• From the initial I-40 murders, Turner’s collaboration across states births the model for proactive, multi-jurisdictional investigations.
• The spike in murders leads to a major summit in Oklahoma City in 2004, prompting intense media scrutiny and the formation of the FBI’s Highway Serial Killings Initiative. After press attention, the specific murder pattern stops—suggesting the killer changed his tactics after realizing investigators were closing in.

“It actually led to the FBI having this initiative, which is great. It’s nice to know that the FBI is aware of this, looking into this.”
— Hannah Smith (28:28)

• As of the episode’s taping, the FBI’s database has over 800 highway corridor murders, with at least 450 long-haul truck drivers considered suspects.

5. Victims’ Stories & Law Enforcement Response

(19:57–36:25)

• Case focus on Casey Jo Pipestem (19, Oklahoma, January 2004) illustrates the human cost:
  • Cast from early trauma into sex work, her murder eventually becomes the key to the investigation.
  • Law enforcement’s evolving approach: building trust with sex workers at truck stops to both warn and encourage tips.
• Authorities arrested other truckers, including Carl Wayne Lawson (after an attempted murder and rape in 2004)—but DNA did not connect him to the I-40 murders.
• Ultimately, John Robert Williams (the “Big Rig Killer”) is suspected in several killings. He confessed to dozens of murders but was only charged (and not tried) in one; most cases remain technically unsolved.

“A semi-truck could be looked at as a crime scene on wheels.”
— Hannah Smith (15:32)

6. Frank Figliuzzi Interview Highlights

(40:00–76:41)

Nature of Highway Serial Killings

• 850+ female victims identified, spanning decades.
• Pattern: the crime occurs across multiple jurisdictions, hampering detection; most rural police forces lack resources or aren’t connected to the FBI’s sub-database in ViCAP.

“It’s almost the perfect way to do this… The truckers in these cases are grabbing their victim in one police jurisdiction, killing her in a second, and dumping the remains in a third, often very rural.”
— Frank Figliuzzi (43:16)

Trucking Subculture & Suspect Profiling

• A “caste system” exists among truckers; the least supervised (owner-operators, “dry vanners”) are most likely to go undetected.
• Advances in trucking tech now make monitoring and tracking easier, but owner-operators may still evade oversight.
• Serial killers are often socially inept and seek isolation; the solitary nature of trucking appeals to their need for anonymity and mobility.

“By far the number one occupation of a serial killer is truck.”
— Frank Figliuzzi (49:05)

Victimology & Trafficking

• Victims of highway serial killings often have histories of significant trauma, exploitation, and are frequently sex-trafficked.
• Law enforcement and rest stop industries previously ignored or even enabled trafficking—recent decades have seen improvements and crackdowns.
• Much sex work and trafficking activity has moved online, changing how and where murders may occur.

Changing Police Attitudes

• Encouragingly, law enforcement now increasingly treats sex workers as potential victims, not criminals.
• Programs that provide immediate exit strategies—shelter, job training, basic needs—prove effective at helping survivors escape pimps and traffickers.

“We have to stop treating trafficking victims as criminals and look at them as the victims that they are.”
— Frank Figliuzzi (69:11)

Notable Quotes & Memorable Moments

On Investigative Frustration

“It’s also, though, so alarming just to think about being in a position in your job where you’re almost waiting for another murder to help you solve the next one.”
— Patia Eaton (19:23)

On Culture of Sex Worker Victimization

“Traditionally we’ve viewed people in sex work from a law enforcement perspective, that they are these criminals, and it’s so clear that they’re victims.”
— Hannah Smith (23:35)

On Suspect Psychology

“Serial killers by definition and by studying all of them, are typically socially inept people… Generally they’ve had traumatic childhoods, dysfunctional, severely… But when they’re attracted to that kind of isolated job… they suddenly realize they could get away with almost anything. And they can.”
— Frank Figliuzzi (45:28)

On Modern Law Enforcement Response

“You want to take down the whole ring of trafficking? How about the intelligence you develop when you develop a rapport and trust with that young victim and she eventually gives up the whole operation?”
— Frank Figliuzzi (69:11)

Key Segments by Timestamp

• Intro to Highway Serial Killings Initiative (03:06–05:35)
• Oklahoma I-40 Murders Detailed Case Discussion (06:03–16:22)
• Jurisdictional & Investigative Hurdles (12:07–17:01)
• The Human Cost: Victims’ Stories (19:57–25:25)
• FBI’s Response, Data, & Initiative Formation (24:22–27:48)
• Frank Figliuzzi Interview: HSK Initiative & Trucking Culture (40:00–51:21)
• Victims, Trafficking, Systemic Change & Solutions (53:46–69:11)
• Tech, Online Threats, and Future Trends (74:00–76:41)

Thematic Conclusions

• The I-40 murders and others like them forced law enforcement to develop new, cross-jurisdictional approaches to serial crime.
• Vulnerable women—especially sex workers and trafficking victims—remain disproportionately targeted.
• Behind each “true crime” headline lies complex personal and systemic tragedy.
• The FBI’s Highway Serial Killings Initiative represents progress, but many cases remain unsolved, and the threat adapts alongside technology.

For Further Listening:

• Frank Figliuzzi’s book: Long Haul
• Follow the hosts @theknifepodcast on Instagram and Bluesky