A Chicago police department used a Bluetooth tracking device to track a man who was using a cellphone to track him.
The Chicago Tribune reported that the device can track up to two miles away, and it can be activated with the push of a button.
The device was activated during a traffic stop on March 16.
A police spokesman told the Tribune that the officers had been trying to locate a suspect who was trying to sell a gun.
Police say the suspect, who is in his 30s, had an iPhone 6 that was turned off and was using the phone to track his whereabouts.
The suspect was not charged with any crime.
A spokeswoman for the Chicago Police Department said that it had no comment on the case.
A Google spokesperson told CNN that the company does not support tracking devices and has “no evidence to support that claim.”
A Samsung spokesperson told the Associated Press that the South Korean smartphone maker does not use Bluetooth tracking technology.
The spokesperson said that Samsung does not track the location of the phone but can use “other types of technology, such as facial recognition technology, which can help identify individuals when using the service.”
The Chicago Police department told the AP that the department does not require the police to wear body cameras or other tracking devices during their investigations.