A 30-year-old Irvington man who attempted to claim he was immune from state law was convicted Friday of carjacking three vehicles and robbing a gas station in a two-day crime spree, prosecutors announced.

George Gaymon. (Police photo)

George Gaymon was found guilty of a 20-count indictment for crimes three years ago, the Essex County Prosecutor's Office said.

In separate statements, assistant prosecutors William Neafesy and Joseph Perez said Gaymon "systematically stalked" defenseless people to rob and carjack them, using fear "as his weapon."

Prosecutors said the crime spree began on March 24, 2014, when Gaymon and his co-defendant, Mario McClain, stole a Jeep Cherokee and a Dodge Intrepid in Orange before robbing a gas station in Newark.

Later that same morning, authorities said, they carjacked the owner of an Infiniti at gunpoint after bumping the car on Speedwell Avenue with the stolen Intrepid.

Prosecutors said the crime spree resumed on March 27, when Gaymon and McClain used the Infiniti to bump a Mercedes-Benz SUV in Irvington before carjacking that vehicle, taking the driver's pocketbook and credit cards.

The two men were caught, authorities said, after they used the stolen credit cards at a sneaker store and deli where they were caught on video.

In a statement Monday, Acting County Prosecutor Robert D. Laurino commended what he said was the work of the Newark and Irvington police departments that contributed to Gaymon's prosecution.

Gaymon did not take his case to trial willingly, prosecutors said. During jury selection before Superior Court Judge Martin G. Cronin, prosecutors said, Gaymon declared himself a "sovereign citizen" and refused to follow the instructions of the judge, who had him removed from the courtroom.

Law enforcement officials have said the "sovereign citizen" ideology, which holds the government's attempts to enforce the law are themselves unlawful actions, has roots in anti-government extremist movements but has since spread through state and federal prison populations via incarcerated adherents.

In addition to first-degree armed robbery, carjacking, theft and conspiracy charges, the prosecutor's office said, Gaymon -- who was represented at trial by defense attorney Jermaine Mercer -- was found guilty of multiple counts of credit card fraud and unlawful weapons possession.

The prosecutor's office on Monday indicated it would seek an extended sentence for Gaymon, who has five prior felony convictions. His sentencing has been scheduled for March 12.

McClain, Gaymon's co-defendant, is currently serving a five to seven-year sentence at the New Jersey State Prison in Trenton for possessing a weapon as a prohibited person, state records show.

Thomas Moriarty may be reached at tmoriarty@njadvancemedia.com. Follow him on Twitter at @ThomasDMoriarty. Find NJ.com on Facebook.

Have a tip? Tell us. nj.com/tips