Maryland Police Departments Pilot SignalTrace Surveillance Tech
Law enforcement agencies are using wireless detection to track electronic device signatures in passing vehicles.
Updated on Oct. 26, 2026 in Law Enforcement
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Police departments in Prince George's County and Harford County are incorporating SignalTrace technology into their investigative toolkits. The system identifies Bluetooth and Wi-Fi signals to create digital fingerprints for devices.
Why it matters
The technology allows law enforcement to track the movement of specific electronic devices and identify groups of devices traveling together. This data is intended to help investigators establish links between suspects and their activities.
The Prince George's County Police Department is currently piloting the technology, while the Harford County Sheriff's Office is in the planning phase for its implementation. The scope of internal policy governing these digital records is still under review.
The players
Prince George's County Police Department
This is a municipal law enforcement agency that is currently conducting a pilot program for the SignalTrace surveillance technology.
Harford County Sheriff's Office
This is a Maryland law enforcement organization that has announced plans to incorporate SignalTrace technology into its operations.
The details
SignalTrace technology scans for wireless signals emitted by personal electronics in passing cars to identify unique device signatures. By monitoring these signals, officers can generate digital fingerprints for devices that consistently travel together.
Timeline
October 26, 2026: News reports emerge detailing the use of SignalTrace by Maryland law enforcement.
Legal Context
The deployment of SignalTrace follows a long precedent of law enforcement agencies using passive surveillance tools like Automated License Plate Readers to monitor traffic patterns. This marks a shift from tracking the vehicle identity to recording the digital signatures of individual devices.
Residents in the affected counties may encounter increased electronic surveillance of their movements during routine travel through public areas. This technology could lead to new investigative procedures where device signals are used as evidence in criminal proceedings.
The takeaway
The use of SignalTrace highlights the evolving capabilities of police to track the movements of citizens via their personal electronics. Residents should remain aware that wireless signals emitted by their devices can now be used to map travel routes and social connections.
Further reading
Learn more about local oversight at Maryland Law Enforcement.
Source note: This article includes information reported by WBFF.
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