A police officer has an unexpected encounter with Gavin Seim when he is pulled over for driving an illegally unmarked police cruiser.

(Video Footage Below)

The stop was very professional and it seems that Seim has experience in this situation before. After flagging down the officer Seim began to record the encounter for YouTube and his personal website.

"In Washington we have unmarked police vehicles impersonating citizens.

If you think it's not a serious issue, try asking those that have been raped or lost loves ones because of unmarked cars.

It's already illegal in WA for public vehicles to be unmarked, unless designated for 'special undercover or confidential investigative purposes,'" according to Seim.

According to his official website, "Seim is a liberty activist, speaker and former US Congressional challenger from WA. He believes in God given liberty, the Constitution and a government by the consent of the governed." He really lays into this officer and showcases deep knowledge for the laws of his state. In his post, Seim has also identified and highlighted legal notes within his extensive write up.