For years, Etan Patz's (AY'-tahn PAYTS') parents were sure they knew who had kidnapped their first-grader on his way to a New York school in 1979, and they were committed to holding him accountable.

Testimony will soon start in the murder trial they so long awaited — with a different man at the defense table. He was never suspected until he gave a 2012 confession he now disavows.

Jury selection is underway for the trial in one of the first missing-child cases ever featured on milk cartons.

The trial partly reflects the Patzes' efforts to keep the investigation going and make missing children a national priority. But it stands to be both searing and complex for them.

The Patzes are declining to comment on the case.