Court documents indicate that 45-year-old Kevin Esterly was arraigned early Sunday on a felony charge of interference with the custody of a child.
The Lehigh County district attorney's office said Esterly arrived Saturday in Allentown, 60 miles northwest of Philadelphia, after being extradited from Miami, Florida.
Federal agents and Mexican authorities found the married father of four and 16-year-old Amy Yu in Playa del Carmen a week ago and flew them to Miami. They had been missing since March 5.
A preliminary hearing is scheduled April 2. The county public defender's office, listed as representing Esterly, couldn't be reached for comment.
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