Sergeant Joseph M. Darby (born c. 1979) is a former U.S. Army Reservist known as the whistleblower in the Abu Ghraib torture and prisoner abuse scandal. Darby is a graduate of North Star High School, near his hometown at the time, Jenners, Pennsylvania. At the time, Darby served as an M.P. at the Abu Ghraib prison, in Abu Ghraib, Iraq. After learning of the abuse, Darby was the first person to take steps to alert the U.S. military command.