Hoping to show off an evidence room in the District of Columbia’s new forensic laboratory, Max Houck stepped up to a small black box near the door. A machine scanned his eyes. Access denied.

Houck, who came on as director of the city’s Department of Forensic Sciences this summer, explained during a tour in early September that the building was so new that his biometric data wasn’t fully in the system yet. The room, like most of the building, was empty, but he noted that the scanner did what it was supposed to do: keep evidence secure.