The Quadro Tracker: How a Fake Drug Detector Sold 1,000 Units Despite Being Obviously Fraudulent

The Quadro Tracker, also known as the Positive Molecular Locator, was a device marketed in the 1990s as a revolutionary tool capable of detecting drugs, weapons, explosives, specific individuals, precious metals, dead pets, wild game, and even golf balls. Despite its scientifically implausible claims, the device sold approximately 1,000 units to police departments and school districts across the United States.

In this week’s entry of our Wiki Wormhole series, we explore the bizarre history of the Quadro Tracker—a scam that duped institutions into purchasing a device that was later revealed to be a hollow plastic box containing no functional electronics.

The Inventor Behind the Scam

The device was invented by Wade L. Quattlebaum, a name that sounds like a cartoon character but was, in fact, a real person—a used car salesman from South Carolina. In the early 1990s, Quattlebaum initially attempted to create a device to locate lost golf balls. However, his invention took an absurd turn when he claimed it could detect a wide range of substances and objects.

The Quadro Tracker purportedly worked using a “locator card” containing the “signature” of the item to be detected. More advanced models even allowed users to insert a Polaroid photo of the target into a slot on the device. Despite the lack of transparency in its operation—a word that here means “completely fabricated”—the device found buyers, including law enforcement agencies and educational institutions.

Prices Ranged from $400 to $8,000

Quadro Corp sold the Positive Molecular Locator at prices ranging from $400 to $8,000, depending on the model. The device’s opaque workings and extravagant claims did little to deter buyers, many of whom were government entities spending taxpayer dollars.

FBI Exposes the Quadro Tracker as a Fraud

The Federal Bureau of Investigation (FBI) played a crucial role in exposing the Quadro Tracker as a scam. Agent Ron Kelly, suspicious of the device’s claims, purchased one and subjected it to an X-ray examination. The results were damning: the device was nothing more than an empty plastic box with a few disconnected wires and an antenna—taken from a transistor radio. As Kelly reported,

“It didn’t take a lot of effort on our part to determine it was a phony.”

Mixed Results in Texas and Florida

The Quadro Tracker was deployed in states like Texas and Florida, where law enforcement agencies reported “mixed results.” A commander of a Texas narcotics task force noted that the device had a success rate of about 50%. While this may seem underwhelming, it was not far off the state’s police clearance rate for violent crime, which stood at just under 40%.

In other words, the hollow plastic box with a radio antenna glued to it performed comparably to some of Texas’ actual crime-solving efforts.

Schools Paid $955 Each for the Device

Perhaps the most egregious misuse of taxpayer funds came from school districts, particularly in Kansas, where multiple districts purchased the Quadro Tracker for $955 apiece. The device’s lack of functionality made it a prime example of wasteful spending in public education.

Why the Quadro Tracker Matters Today

The story of the Quadro Tracker serves as a cautionary tale about the dangers of pseudoscience and the ease with which institutions can be duped by fraudulent devices. In an era where scams—from cryptocurrency to AI-driven fraud—are rampant, the Quadro Tracker stands out as a particularly brazen example of deception that thrived despite its obvious implausibility.

While the FBI ultimately exposed the scam, the Quadro Tracker’s legacy lives on as a reminder of the importance of skepticism and due diligence, especially when public funds are at stake.