Las Vegas police used facial recognition technology to identify a man suspected of punching another at a car show, local media reports.Ernesto Cortez, 38, was arrested Jan. 8 and charged with battery resulting in substantial bodily harm, court records show. The Metropolitan Police Department identified Cortez through facial recognition technology and surveillance footage of a man punching another at a car show near UNLV on Nov. 23, according to Cortez's arrest warrant.”I utilised facial recognition technology, which is operated by trained individuals assigned to LVMPD's Technical Operations section, and identified a subject bearing a likeness to the person in question,” wrote the detective who authored the arrest warrant.The detective did not elaborate further on the use of facial recognition in the case.Metro's technical operations section also oversees ShotSpotter, a network of audio sensors designed to detect gunshots in the Las Vegas Valley, according to the department's 2018 annual report.