Complex sentence: After graduation he was transferred to the staff of the Reichsführer-SS in May 1937, and served in the Schutzpolizei in Lübeck being promoted to Leutnant of Schutzpolizei in May 1938 he was sent to the Police school at Berlin Köpenick.
Split into simpler sentences: After graduation he was transferred to the staff of the Reichsführer-SS in May 1937, and served in the Schutzpolizei in Lübeck being promoted to Leutnant of Schutzpolizei. In May 1938 he was sent to the Police School at Berlin Köpenick.