Between August 2024 and May 2026, three separate murder suspects in Texas removed their court-ordered GPS ankle monitors and disappeared. One fled the country. One hid under his grandmother’s floorboards for a month. One killed someone else during the 103 days he spent as a fugitive.
These are not edge cases. They represent a systemic pattern that exposes a fundamental question every pretrial monitoring agency in America should be asking: why is it still this easy to defeat a GPS ankle monitor?
What Happened in Each Case?
Case 1: Lee Gilley — Murdered his pregnant wife, fled to Italy. Gilley, 39, was charged with capital murder after strangling his wife Christa Bauer Gilley, who was nine weeks pregnant, in Houston in October 2024. Released on a $1 million bond with GPS monitoring and passport surrender, Gilley cut off his GPS ankle monitor on May 1, 2026, traveled through Canada, and boarded an Air Canada flight to Milan using a forged Belgian passport. Italian border police detained him on May 3 — but not before he had crossed multiple international borders while supposedly under electronic supervision.
Court records revealed that while on bond, Gilley had been communicating with a woman in California about plans to flee to Mexico, discussed removing his GPS monitor, and researched obtaining false identity documents. None of these planning activities triggered an intervention before he actually removed the device.
Case 2: Trevor McEuen — Capital murder suspect, vanished on trial day. McEuen, charged with capital murder in the shooting death of neighbor Aaron Martinez in Forney, Texas, was released on a $2.25 million bond in September 2024. He had already violated bond conditions by posting threatening content on social media and allegedly threatening to shoot Martinez’s uncle — his bond was raised to $2 million and he was briefly re-jailed, but posted bond again in December 2024.
At 5:33 AM on the morning his trial was scheduled to begin, McEuen cut off his ankle monitor and fled. The Martinez family had explicitly warned authorities that electronic monitoring would not be sufficient to contain him. McEuen was found nearly a month later, hiding in a hole he had cut in a closet floor beneath his grandmother’s house.
Case 3: Daemon Ponce — Cut his monitor, then committed a second murder. Ponce was charged in the March 2022 shooting death of John Reyes in Fort Worth. Released on a $70,000 bond with 24-hour home confinement and GPS monitoring, Ponce cut off his GPS monitor on August 1, 2024. His girlfriend reported hearing the monitor beeping and woke to find him gone.
For 103 days, Ponce was a fugitive. On October 12, 2024, shots were fired from a vehicle at a Fort Worth mechanic shop. Jamarein Pevy, 19, was killed and another man wounded. Police formally charged Ponce with Pevy’s murder, and he was arrested on October 18 on the bond violation warrant. A second person is dead because an ankle monitor could be defeated with a pair of scissors.
Why Do GPS Ankle Monitors Keep Failing in High-Risk Cases?
Every GPS ankle monitor on the market today detects removal. That is not the problem. The problem is what happens in the minutes and hours after detection — and whether the device itself creates any physical barrier to removal in the first place.
Traditional ankle monitor straps use rubber or thermoplastic polyurethane (TPU) bands secured with rivets or simple clasps. A determined individual with wire cutters, strong scissors, or even a kitchen knife can sever the strap in 30-60 seconds. The monitoring center receives an alert — but by the time law enforcement responds, the defendant is gone.
The Gilley case illustrates the full scope of the problem. Cutting the monitor was the last step in a plan that included securing fake documents, coordinating with contacts in California, and booking international travel through Canada. The GPS monitor tracked his physical location but did nothing to detect or prevent the months of escape planning that preceded the removal.
The Ponce case illustrates the consequence gap: 103 days elapsed between the tamper alert and the suspect’s arrest. During that period, someone else died.
What Technology Exists to Prevent This?
The technology gap between what these defendants defeated and what exists on the market today is substantial. Three specific advances address the exact vulnerabilities these Texas cases exposed:
Fiber-optic tamper detection embeds an optical fiber within the strap material. Any attempt to cut, stretch, or manipulate the strap breaks the fiber, triggering an instantaneous alert. Unlike PPG (heart-rate) sensors that produce 15-30% false alarm rates from sweat, movement, or skin condition changes, fiber-optic detection operates on binary logic — light passes through the fiber or it does not. The CO-EYE ONE from REFINE Technology uses this approach, reporting zero false tamper alarms across more than 200,000 deployed devices.
Steel-reinforced straps embed steel wire within fiber-optic strap material, making the band resistant to cutting with standard tools. This does not make the strap unbreakable, but it transforms removal from a 30-second task into a noisy, time-consuming effort that substantially increases the probability of intervention before the defendant can flee.
Post-power tamper protection addresses a gap most agencies do not consider: what happens after the battery dies? On traditional monitors, a dead battery means a dead device — no alerts, no evidence. Advanced devices like the CO-EYE ONE maintain tamper detection capability for three months after complete battery depletion, preserving forensic evidence even if the defendant waits out the battery before attempting removal.
What Is Texas Doing About It?
The Texas legislature has responded with two significant measures, though neither directly addresses the technology gap:
Senate Bill 1020, passed during the 89th legislative session (2025), requires personal bond offices and community supervision departments to notify courts “immediately after” determining reasonable cause that a defendant has violated electronic monitoring conditions. The law also authorizes sharing GPS location data with law enforcement during active violations. Before this legislation, notification delays sometimes meant hours passed before a judge could issue a warrant — hours that defendants like McEuen used to disappear.
Proposition 3, approved by Texas voters in November 2025, amended the state constitution to give judges greater authority to deny bail for defendants accused of violent felonies. This constitutional change directly addresses the root question: should capital murder suspects be released on bond at all, regardless of monitoring conditions?
The answer from the Martinez family — who warned the court that electronic monitoring would not prevent McEuen from fleeing — appears in hindsight to have been tragically correct.
What Should Agencies Evaluate When Monitoring Violent Offenders?
For agencies and courts that do grant bail with GPS monitoring conditions in violent felony cases, these three Texas cases provide a concrete framework for evaluating monitoring technology:
- Physical tamper resistance, not just detection. Every monitor detects removal. The question is how long the strap resists a cutting attempt. Steel-reinforced fiber-optic straps measured in minutes of cutting resistance versus seconds for standard TPU create a fundamentally different risk profile.
- Alert-to-response latency. Ponce’s monitor detected removal on August 1. He was arrested on October 18. For high-risk defendants, tamper alerts must trigger automated escalation protocols — not just a notification in a monitoring center queue.
- Behavioral pattern analysis. Gilley planned his escape for weeks while wearing a GPS monitor. Systems that analyze communication patterns, travel to unusual locations, or proximity to border crossings could flag escape-planning behavior before the strap is cut.
- Post-power forensic capability. If a defendant drains the battery and waits, does the device still record tamper events? Three months of post-power tamper detection means courts retain forensic evidence regardless of when removal occurs.
- Multi-mode connectivity resilience. A defendant who removes a monitor in a cellular dead zone may not trigger an alert at all if the device relies solely on LTE. Devices with WiFi and BLE backup channels maintain alert capability even without cellular coverage.
The Fundamental Question
Texas is not the only state grappling with GPS monitor removals by violent offenders. But the concentration of three high-profile failures within 22 months — each involving murder charges, each involving a defendant who simply cut the strap and walked away — strips the issue down to its core.
Electronic monitoring works. The National Institute of Justice has documented its effectiveness in reducing recidivism and improving pretrial compliance rates. But “electronic monitoring” is not a single technology with uniform capabilities. The gap between a basic GPS tracker with a TPU strap and a next-generation device with fiber-optic tamper detection, steel reinforcement, and multi-mode connectivity is the gap between a paper warning and an enforceable restraint.
Three families in Texas know which side of that gap their monitoring fell on.
