Complex sentence: Buchenwald had first caught the attention of Waldeck in 1941 when glancing over the camp's death list, he had stumbled across the name of Dr. Walter Krämer, a head hospital orderly at Buchenwald.
Split into simpler sentences: Buchenwald had first caught the attention of Waldeck in 1941. Glancing over the camp's death list, he had stumbled across the name of Dr. Walter Krämer, a head hospital orderly at Buchenwald.