Tahaya Buchanan was sought on a 2007 indictment on charges of staging the theft of her Range Rover.
Paul Loriquet of the Essex County Prosecutor's Office says the U.S. Citizenship and Immigration Services office in Atlanta was unaware of the 39-year-old's status even after Buchanan was arrested in July during a traffic stop in which police noticed the warrant.
Immigration spokeswoman Ana Santiago tells The Star-Ledger of Newark she did not have information whether the office regularly checks its employee list against national criminal warrants.
Buchanan pleaded guilty to one charge of insurance fraud on Monday and faces three months probation.
Information from: The Star-Ledger, http://www.nj.com/starledger