Instance of Athcops using geolocation data

Reuters article exposing child labor of migrants in the United States to the benefit of automaker Hyundai includes this line: "Using cell phone geolocation data, police [I believe of the town of Enterprise in the state of Georgia] located Cucul and the girl in a parking lot in Athens, Georgia." https://www.reuters.com/world/us/exclusive-hyundai-subsidiary-has-used-child...