That a corrupt judge/government incited you to collaborate with another corrupt government's political police doesn't change the fact that this collaboration took place.

Without abiding by Godwin's law, "i was merely operating under local regulations" is a well-known defense of nazi collaborators during WWII and was considered an invalid argument then and now.

If you ever receive a court order ordering you to kill someone, will you do it without even giving it second thoughts just because it's a local law?!

See also: milgram experiment, stanford experiment, and in general social studies on the authoratitive/fascist mindset.