John M. Lloyd

John Minchin Lloyd was a bricklayer and police officer in Washington, D.C., in the United States. He was one of the first police officers hired by the Metropolitan Police Department of the District of Columbia when its Day Watch was first formed in 1855. He played a role in the trial of the conspirators in the Abraham Lincoln assassination. Arrested but never charged in the conspiracy, Lloyd's testimony was critical in convicting Mary Surratt.