Flock’s cameras scan more than 20 billion license plates a month, and they’ve found kidnapped kids and closed murder cases. They’ve also tracked police officers’ ex-girlfriends, shown up in a Virginia woman’s front yard uninvited and nearly ended up on 350,000 Ubers. Now, 30-plus cities have pulled the plug, the company is scrambling to add rules and its own CEO reportedly keeps his plates out of the system. Here’s the whole story, plus the free map that shows every camera near you.