The following video is brought to you courtesy of the Wall Street Journal YouTube Channel. Click the video below to watch it now.
The U.S. government is using app-generated marketing data based on the movements of millions of cellphones around the country for some forms of law enforcement. We explain how such data is being gathered and sold. Photo: Justin Lane/Shutterstock
More from the Wall Street Journal:
Visit WSJ.com: http://www.wsj.com
Visit the WSJ Video Center: https://wsj.com/video
On Facebook: https://www.facebook.com/pg/wsj/videos/
On Twitter: https://twitter.com/WSJ
On Snapchat: https://on.wsj.com/2ratjSM