Melissa Langley, 20, of southeast Washington, D.C., was arrested in connection to the stabbing of a manager at Metro's Stadium-Armory station.
At about 11:45 a.m. March 15, Metro Transit Police and medics responded to a report of a station manager who had been stabbed by a female patron following a fare dispute.
The station manager was treated at a local hospital.
Langley is charged with assault with a deadly weapon. She was arrested without incident at her residence Monday afternoon.