The FBI said Ann Pettway turned herself in to the bureau's office in Bridgeport, Conn., CNN reported.
A law enforcement source told CNN Pettway in Stratford, Conn., earlier had contacted a Bridgeport police officer using Facebook, but Bridgeport police would not comment on that scenario.
Pettway was believed seen in Bridgeport Saturday visiting a pawn shop where the New York Post said she attempted to hock a laptop and some jewelry.
Bridgeport police were looking for Pettway, who is wanted on a probation-violation warrant out of North Carolina. A North Carolina Department of Corrections official told CNN Pettway was on probation for embezzlement and under orders not to leave the state.
But the real interest in Pettway stems from last week's events involving her supposed daughter, Carlina White. White made contact with her real mother 23 years after she was reported abducted as a baby from a New York hospital.
Pettway may now face federal kidnapping charges, the Post said.