A guy in Portland, Oregon named Robert West has been filming license plates of ATF, U.S. Marshals, and other law enforcement agencies' vehicles. The guy gets harassed frequently while making videos like the one embedded on this page. He is frequently harassed, but knows his rights and lets the cops know it. CopBlaster.com took some screenshots of some of the license plates that West filmed, made a collage of some of them, and wrote down several others.
The U.S. Marshals license plates are:
The ATF license plate is 766 era.
These vehicles are suspected of being used in undercover activity, so be on the lookout. If you see any of these license plates take notice.