Messenger on a White Horse (2017) is a Documentary film that follows explores the life and work of English journalist Robert Cox, the former editor of "The Buenos Aires Herald" daily newspaper, whose investigative reporting in the late 1970s exposed the shocking human rights crimes of Argentina's military dictators. Currently, you can watch Messenger on a White Horse on Amazon Video. Streaming availability may vary by country and platform over time. It has a user rating of 7.0 out of 10 from 7 votes. Fans of documentary movies may also want to explore similar titles below.