Patient transfer near Mercantile Lane in Upper Marlboro Heard on: Prince George'S County MD Fire Dispatch 00:15 00:00 (number withheld) Mercantile Lane, Cross Street, Technology Way. Transcript This transcript is auto-generated from live dispatch audio and may be incomplete or inaccurate. It is not an official report and may change. 00:00 (number withheld) Mercantile Lane, Cross Street, Technology Way. 00:05 Charlie patient transfer box area 4602 . 00:09 Paramedic ambulance 806 respond on talk group eight alpha one. 2026-09-28 04:56 UTC Medical Emergency Mercantile Ln, Upper Marlboro, MD 20774 View on map