NEW YORK —  The search for a New Jersey woman missing since her son was found abandoned in a parking lot last summer led authorities on Sunday to a Staten Island pond, where human bones were discovered in a suitcase.

Two men were charged last week in Amy Giordano's disappearance, including the man with whom she was having an affair, according to authorities. Rosario DiGirolamo, of Millstone, N.J., was charged with murder.

A second man, John A. Russo Jr., of Staten Island, was charged with tampering with evidence in Giordano's death, and helped New Jersey authorities in the case, said his attorney, George Vomvolakis.

"Based on his cooperation and their own investigation, they were led to this area on Staten Island," Vomvolakis said.

The Mercer County prosecutor's office in New Jersey said the skeletal remains found at the pond Sunday hadn't been identified and DNA testing was being performed.

Giordano, 27, of Hightstown, N.J., vanished in June. Two days later, her 11-month-old son was found abandoned in a hospital parking lot in Newark, Del.

DiGirolamo pleaded guilty in November to reckless endangerment and child abandonment. The child is now in foster care.

DiGirolamo's attorney, Jerome Ballarotto, said he was ready to defend his client against the murder charge.

DiGirolamo, 33, faces 30 years to life in prison if convicted, prosecutors said. Russo, 43, faces a maximum of 18 months in prison if convicted, they said.

Vomvolakis said Russo would surrender to police in the next few days.