Flock posted videos on its YouTube channel highlighting at least four police departments whose officers have faced allegations of misusing the company’s tech.

"Flock’s array of license-plate cameras was built to fight crime. But at least 50 law enforcement officers were charged with or accused of misusing it and other systems."

A police usage policy for automatic license plate readers (ALPRs), recently obtained by 404 Media, provides an explicit example of how police departments avoid revealing when…