MIAMI — The soundless video shows a man wearing a protective mask picking up bags and boxes outside a white van when a Miami police officer pulls up.

The officer steps out of his squad car. Words are exchanged. Then the officer handcuffs and detains the man, Dr. Armen Henderson, who was recently featured in a Miami Herald article about volunteers who provide free coronavirus testing for homeless people in downtown Miami.

Dr. Henderson was eventually removed from the handcuffs after his wife, Leyla Hussein, emerged from the couple’s home and showed identification to the officer.

Dr. Henderson was not arrested, but after video of the encounter was shared widely online, Chief Jorge Colina of the Miami Police Department ordered an internal investigation into the matter.