Northeastern University researchers say they secretly tracked 100,000 people outside the U.S., using cell phone towers and the peoples' phone calls and text messages to track their movements for six months.
They found nearly three-fourths of those studied stayed mainly within a 20-mile-wide circle.
The FCC says non-consensual tracking is illegal in the U.S., but the study opens the question of human tracking for scientific purposes and growing privacy concerns.
Click here for more headlines from ABC7 Eyewitness News
Copyright © 2025 KABC Television, LLC. All rights reserved.