I will leave it up to you as to whether a policeman enforcing civil law is therefore a collaborator. I don't think so myself. However I would point out one aspect of collaborating with the Germans you overlook - collaborating with the Germans to many meant fighting against Stalin and Russia. Can you honestly say that fighting on Stalin's side was any more praiseworthy than fighting on Hitler's side? Remember, Stalin killed several times as many innocent people as HItler.
U.S. defense contractor accused of copying secret military documents (Reuters)
from the article: Why has Pope Benedict chosen now to beatify Nazi-era pontiff?