Little is known about Metz's early life before he joined the Nazi Regime, other than he was possibly from Austria and had served in World War I (as indicated by his medals). When the Nazis came to power in Germany, Metz served as a commandant in the army and was eventually posted at a concentration camp in Stalag. During World War II, Metz became notorious for his brutality towards American prisoners of war and forcing them into hard labor, especially those who were of Jewish background
When American soldier Robert Zussman, who was secretly Jewish, is captured in December 1944, he is taken to a German Labor camp and is interrogated by Metz on which of the prisoners are Jewish. When Zussman refuses to comply, he is beaten and put on a train to a labor camp. On April 4, 1945, after the 1st Infantry Division continue searching for Zussman for months, they find the camp where he was being held at and witness the horrific atrocities that Metz and his men have committed against the Jewish prisoners, including mutilations and executions
When William Pierson finds a trail leading out of the camp, they realize the Nazis led the prisoners on a death march, leading Red Daniels and Pierson to head deep into the forest to find Zussman. Metz soon begins executing prisoners, the gunshots alerting Daniels to his position. Daniels finds Metz throwing Zussman to the ground ready to execute him with his gun, but Daniels shoots and kills him before he can fire his weapon. His body was left behind in the woods
