SEEING a car he thought was hooning, Stephen Jacob Muir, decided to take matters into his own hands.
On May 7, Muir, 20, saw a car he thought was involved in a drag race on the Ipswich Mwy. He called 000, but then ignored their advice and moved to intercept the car himself.
He drove behind it and began flashing his lights, and waving for the driver to pull over.
The woman driving later told police she thought he flashed red and blue lights, however, police did not find any.
She pulled over and he walked to her driver's window.
He told her she was in trouble and would be in more trouble if she lied.
He told her to follow her to the Goodna police station, which she did, thinking he was a police officer.
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When they arrived he told her to go inside, and he drove away.
She walked to the front door of the station and found it was locked.
A month earlier, on February 6, Muir placed a fraudulent ad trying to sell a firearm.
Not owning a gun, or holding a weapons licence, he found pictures and a description of the weapon online and placed the ad.
He was contacted by an interested buyer, who agreed to buy it and transferred $719.65 into his bank account.
Muir was contacted a number of times by the buyer about why he never received the gun.
Muir pleaded guilty at the Ipswich Magistrates Court on Friday to fraud, assuming the designation or role of a police officer, and contravening a police direction.
Muir told the police he had defrauded the buyer because he needed the money, and had hoped to one day pay him back.
When arrested, he told police when he saw what he thought was a hooning offence he believed he had a right to execute a "citizen's arrest".
The court heard the 000 operator did not advise him to get involved or intercept the car.
He denied having red and blue lights and said he flashed his headlights at the car.
The sentence was adjourned for a psychological report ordered.