I set the dark phone face down on the Formica table and turned my chair toward the narrow window.

Outside, far beyond the empty rows of the hospital parking lot, the dark sky over Brooklyn Park was starting to turn a pale, cold gray along the trees.

At five minutes to nine on Sunday morning, Detective Miller walked into the family room holding a dark USB flash drive between his thumb and index finger.

“The hospital security team finished exporting the timestamped video files from the second-floor corridors,” he said, gesturing toward the hallway door.

He led Kevin and me down two flights of concrete stairs into a small, windowless security office tucked beneath the main lobby.