Fifteen years after the Escondido Police Department first experimented with body-worn cameras, and 10 years after protests in Ferguson, Missouri, sparked national interest, the technology has become vital to modern-day law enforcement operations. Add to that a new challenge — a controversial artificial intelligence program being used to review the mountains of video and audio.

Carlsbad CA— Beginning March 1, the City of Carlsbad Police Department will begin a four to six week trial of body-worn cameras. The initial test will include six police officers with the eventual goal...