GRANT COUNTY, Wash. — When a police officer in Washington state was stopped by “constitutional activist” Gavin Seim, he received a lesson in law enforcement. Seim said on his website that he spotted the police officer in an unmarked car, so he waved him down and asked the officer for his ID.

Seim then told the officer it was against the law to pull over the public using an unmarked vehicle.

The officer seemed taken aback at first, but eventually listened to what Seim had to say.

“That’s good to know,” the officer told Seim.

“And that is how you stop a police officer,” Seim said about the encounter. “Some people may say this is petty, leave the officers alone Gavin. It’s not petty to hold police accountable.”