No Expectation of Privacy in Ankle Monitor GPS Data

By Ken Wallentine

United States v. Mathews, 2017 WL 1407036 (D. Colo. 2017)

Officers suspected Mathews of committing two pawn shop robberies. Mathews was on supervised release and wore an ankle monitor. Mathews’ parole officer participated in the task force investigating the robberies. He accessed Mathews’ ankle monitor GPS records and determined that Mathews was wearing his ankle monitor in the pawn shops at the time of robberies (no one said that Mathews is a criminal genius!).

Mathews was charged with the robberies. He argued that the GPS evidence was the result of an illegal “search” of the ankle monitor data. The court agreed that parole officials were “perpetually ‘searching’ Mathews within the meaning of the Fourth Amendment for as long as he wore the ankle monitor.” However, the legal issue to be resolved was whether Mathews had a legitimate expectation of privacy in the ankle monitor GPS data.

Mathews complained that his parole officer exceeded his authority in searching the data while acting in his task force investigator role. He claimed that any other officer would have needed a search warrant to obtain the GPS data. The court ruled that the search was proper. First, Mathews had a release condition that allowed a parole officer “to search your person, vehicle, residence or any property under your control.” This search happened without intruding on Mathews’ person or property; in fact, it happened without his knowledge. Thus, reasoned the court, it did not matter whether it was Mathews’ parole officer or another officer who conducted the search. Second, the court noted that the GPS data was historical—not real-time surveillance.

Related:
GPS Tracker Installation Specifics Fall Outside Court’s Jurisdiction
In Novel Argument, 6th Circuit Distinguishes Historical CSLI Information from GPS Tracking

 
Lexipol Law Enforcement

CHIEF KEN WALLENTINE is a Special Agent who directs the Utah Attorney General Training Center, overseeing use of force training and investigation and cold case homicide investigations. He is also a consultant and Senior Legal Advisor for Lexipol. Ken formerly served as Chief of Law Enforcement for the Utah Attorney General, serving over three decades in public safety before a brief retirement. He also serves as the Chairman of the Peace Officer Merit Commission of Greater Salt Lake County.

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