Behavioral Detective
Everyone's hiding something. After nine years as a Washington DC process server and private investigator, I got pretty good at finding it. Now I'm writing everything down: true stories, crime fiction, and everything in between.
The Behavioral Detective.
True(ish) stories on Sundays. Fiction on Wednesdays. Give it one episode. Just one.
True crime adjacent with a real estate bent.
Episodes
21 episodes
Do Not Destroy That Film: Unexpected G-Men
What happens when a routine real estate photo shoot accidentally puts you in the crosshairs of a G7 security detail?In the fall of 1994, Chris Lengquist was transitioning out of the high-stakes world of surveillance to focus on de...
Missing at Lake Missouri: A Cal Brink Files Short Story
The Invisible Paths: A 4th of July Escalation at Lake MissouriA missing child, a snap judgment, and the hard reality of what happens when a crowd turns its gaze on you.It’s the Fourth of July, 2026. Cal Brink is sitt...
Turning the Mic on the Detective: An Author's Conversation with his Wife
What happens when the person who knows you best sits down to cross-examine your writing? The truth bleeds right onto the page.For twenty-five years, Chris Lengquist has been telling gritty, observant stories from his days in the i...
True Crime Process Server Story: He Shot at Me
What happens when a standard, low-key daylight process service turns immediately hostile? You find out exactly how your body burns off adrenaline.It’s 1988 in Hyattsville, Maryland. A young process server executes a routine, non-c...
Behind the Writing of Notice of Assignment: An Author Offers Insight
Part 2 of Chapter One: Blue Ink, Hidden Clues, and Real Estate Truths NOTE: I was traveling and the audio was recorded in the Thunderbird Lodge at Grand Canyon National Park. Sorry, but the audio isn't the ...
Private Investigator Ruse: A Clumsy Delivery
The Behavioral Tells of a Clumsy DeliveryWhen a target vows he will never be caught, an investigator can't rely on brute force. You have to rely on human nature.It’s an early morning in Maryland, and a young process ...
Inside Chapter One: The Gray Area Where Truth Meets Fiction
Behind the Writing of Notice of AssignmentWhat happens when an author pulls back the curtain and breaks down a manuscript line by line? You find out exactly where the fiction stops, and where real life begins.Today, ...
Invisible in D.C.: A Lesson in Authenticity at the Swedish Embassy
The Swedish Ambassador’s Library: Status Drops and Hidden Lineage In a city run strictly on power, money, and status, the hired help is usually completely invisible. But one night in 1991, the rules of Washington, D....
My First Book Has Been Sent to the Editor: Notice of Assignment
Writing a complete book is a weird, nerve-wracking, and exhilarating feeling. But the milestone is officially locked in.Today, we are pulling a wildcard. Rather than our usual Wednesday case file, this episode brings a massive ann...
DC Parking Enforcement: 1980s Fieldcraft of a Former Private Investigator
The boot trucks were like prowler subsIn the high-stakes game of mobile surveillance, the biggest threat to a private eye isn't a blown cover. Sometimes it’s a city parking enforcement officer.Following a subject thr...
The Russian Federation's White Ford Taurus
The perfect surveillance vehicle doesn't turn heads—it disappears completely. But sometimes, an invisible car has a history straight out of an espionage thriller.It’s 1994, and Cal Brink is finally ready to upgrade his legendary, ...
The Red Line Recruiter: Spycraft on the DC Metro
In the trenches of Washington, D.C. during the late 1980s, the line between routine legal work and international espionage was razor-thin.Picture the Red Line Metro plunging into the underground at thirty miles per hour. I'm sitti...
How Appraisal Fraud Happens
Most people think real estate fraud started in 2008. But back in 1992, the blueprints for the Great Recession were already being drawn in the front seat of a parked car.Meet George. To the banks, he’s a pristine, reliable real est...
Joan Jett and BBQ. John Riggins in an Elevator. Meeting DC Celebrities.
Expect the unexpected. In this special episode of the Behavioral Detective, Chris Lengquist shares what happens when a life in investigation collides with cultural icons out of left field.Step back into Washington, DC in the late ...
Charlie Had a Dinosaur (continued): Chapters 3, 4 and 5
The Underground Offer: Kojak, Quick Cash, and a $50 ContractChapters 1 & 2 were published on May 13, 2026The exit ramp from a predictable 9-to-5 rarely looks like a corporate ladder. Sometimes, it looks like a dive bar ...
The Bag Phone: Low Tech Tracking in a High Stakes Serve - Case File #022
Before GPS and smartphones, process serving was a game of quarters, paper maps, and pure imagination.It’s late 1988, and I'm staring down a "rush" subpoena with no apartment number, no vehicle description, and a deadline that coul...
Charlie Had a Dinosaur : Chatpers 1 & 2
Sometimes, the best career opportunities don’t come from a job board. They come from a dark parking lot at 10:00 PM.In this episode, we meet Cal, a pizza delivery driver just trying to make ends meet for his new wife. A Wednesday ...
He Had a Badge. I Had an Attitude. - Case File #034
He Had a Badge, I Had an Attitude Case File #034PARENTAL NOTE: This episode has adult language.Twenty minutes. That's how long a Prince George's County police officer made me wait behind bullet-proof glass while ...
Traci Brown: Body Language Expert Interview
Decoding Deception with Traci BrownCan you spot a lie before the first word is even spoken? In this episode of the Behavioral Detective, Chris dives into "Street Science" with Traci Brown, the world’s #3 body languag...
Professional Stalker
My name is Chris Lengquist. I spent nine years as a process server and private investigator in Washington, DC, Maryland and Virginia. From 1987 to 1995, I knocked on doors people didn't want knocked on, followed people who didn't want to be fol...
Case File #001: From Chicken Grease to Process Serving
The legal world is full of high stakes, but for Chris, it started with the smell of fried chicken and a leap of faith.In this debut episode of The Behavioral Detective, Chris takes us back to late 1986, the moment a chance encount...