In the wake of the Parkland, Sandy Hook and other school shootings too numerous to mention, U.S. school districts and parents who pay the bills are pouring millions of dollars into high-tech surveillance, crisis response, and police technologies in a desperate search for solutions.

Will they work? Nobody really knows. Many of these new technologies—AI-enabled search, facial recognition software, license plate detection, patrolling robots, microphones that detect gunshots—are still experimental and have yet to be tested in live shooting situations.

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