Did Wernher Von Braun know about the Mittelbau-Dora KZ victims who worked at the Mittelwerk V2 site?

Wernher Magnus Maximilian Freiherr von Braun (March 23, 1912 – June 16, 1977) was a German-American aerospace engineer. He was the leading figure in the development of rocket technology in Germany and a pioneer of rocket technology and space science in the United States.