"As my ongoing investigation into Amazon illustrates, it has become increasingly difficult for the public to move, assemble, and converse in public without being tracked and recorded," said Markey in a statement. "We cannot accept this as inevitable in our country. Increasing law enforcement reliance on private surveillance creates a crisis of accountability, and I am particularly concerned that biometric surveillance could become central to the growing web of surveillance systems that Amazon and other powerful tech companies are responsible for."

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Asked for comment, a Ring spokesperson said the law "authorizes companies like Ring to provide information to government entities if the company believes that an emergency involving danger of death or serious physical injury to any person, such as a kidnapping or an attempted murder, requires disclosure without delay. Ring faithfully applies that legal standard."

"It's simply untrue that Ring gives anyone unfettered access to customer data or video, as we have repeatedly made clear to our customers and others," the spokesperson added.