From London to Brazil to New York, police forces are adopting facial recognition technology. They say it helps fight crime. Critics say it violates privacy and risks police overreach. The truth may be somewhere in the middle. On this episode of the BU Podcast, former UK Biometrics & Surveillance Commissioner, Professor Fraser Sampson, shares his thoughts on how law enforcement is using facial recognition, and what it means in a world already flooded with CCTV and cameras in every pocket.