Complex sentence: An inside man was even found, Heidentaler, the uncle of a captured soldier, Dieser, who was vehemently anti-Nazi, lived in Salzburg, 20 km from the Berghof and regularly visited a shooting range 16 km from the Berghof with likeminded shopkeepers.
Split into simpler sentences: An inside man was even found, Heidentaler, the uncle of a captured soldier, Dieser, who was vehemently anti-Nazi, lived in Salzburg, 20 km from the Berghof. He regularly visited a shooting range 16 km from the Berghof with likeminded shopkeepers.