A witness in the trial of the Delaware County man accused of producing more than a million images depicting child pornography broke down yesterday when she described how the man she once called "Dad" allegedly sexually assaulted her and took pictures of the abuse at the same time.

John Jackey Worman, 41, of Colwyn, is charged in a federal indictment with 55 counts of manufacturing child pornography and one count of possession of child pornography. He was arrested in 2006.

The victim, now 20 years old, who is not related to Worman, told those in the Philadelphia federal courtroom how he would take her to the mall and for ice cream.

"That's what Dads would do, that is why I felt so comfortable, so close to him," she said. It is The Inquirer's policy not to identify victims of sexual abuse.

The witness said the abuse began when she was about 5 or 6 years old. The second defendant in court yesterday, Dorothy Prawdzik, 44, of Drexel Hill, is charged with various counts of aiding and abetting Worman's alleged manufacturing of child pornography.

A third defendant, Concetta Jackson 45, of Collingdale, pleaded guilty last week to use of a minor to produce depictions of sexually explicit conduct. She will be sentenced in December.

Prosecutors allege that, over a nine-year period, Worman molested at least 12 children, ranging in age from 3 months to 15 years, who were in his care at the time of the offenses.

Some of the victims, prosecutors say, are Jackson's and Prawdzik's biological children. Others were infants Jackson was baby-sitting while their parents were at work. Some of the videos show Worman having sex with infants, one as young as 3 months.

"What he did to those children - those infants - is every parents worst nightmare," said Michelle T. Rotella, lead prosecutor with the the U. S. Attorney's Office, during opening statements. She called the photos graphic, repulsive, and shocking. "They are images you will never forget."

When the 12 jurors and four alternates, whittled down from a pool of 250, had their first look at the photos, they appeared visibly shaken. Some looked away quickly, others pursed their lips and shook their heads.

Mark Cedrone, defense attorney for Worman, asked the jurors not to judge on the depravity of the case but whether the government could prove the pornography was "produced using equipment that traveled in interstate or foreign commerce."

Steven G. Laver, attorney for Prawdzik, also acknowledged the "awful" evidence. He implored the jury to understand that "these are two separate trials."

Prawdzik is not facing as many charges as Worman.

The 20-year-old witness told the court she began to realize something was wrong while watching episodes of Law and Order and CSI that involved sex crimes. She was about 15 or 16 years old at the time.

"How come these guys are being put away, and he is not?" she asked.

When the witness heard there were photos of her younger brother, she told an athletic trainer at her high school about the abuse. School officials contacted police.

"I knew what happened to me; I didn't want it to happen to him," she said.