Doorbell-Camera Firm Ring Has Partnered With 400 Police Forces, Extending Surveillance Reach

The doorbell-camera company Ring has quietly forged video-sharing partnerships with more than 400 police forces across the United States, granting them access to homeowners' camera footage and a powerful role in what the company calls America's "new neighborhood watch."

Ring is owned by Amazon, which bought the firm last year for more than $800 million, financial filings show. Amazon founder Jeff Bezos also owns The Washington Post.