A 34-year-old Lancaster city man convicted of having one of the largest child pornography collections in county history was sent back to prison Friday.

Andrew "Andy" Paul Spedden violated his probation after he was kicked out of a sex-offender treatment program in August for viewing Internet pornography, discussing sex with minors in online chat rooms and targeting children for sex at Lancaster County Library and a city church, according to court testimony Friday.

A sex-offender therapist who worked with Spedden told Judge James P. Cullen Friday Spedden "is one of the highest-risk sexual offenders I've worked with in eight years."

Cullen revoked Spedden's probation and scheduled a sentencing hearing for March 2.

Spedden was released from prison in June 2005 after serving 5 months of a 2-year sentence for possessing child pornography. He was placed on probation for 3 years.

Spedden was required to register his address with state police for 10 years and undergo sex-offender counseling. He initially enrolled in treatment with Pennsylvania Counseling Services but switched to T.W. Ponessa & Associates in January 2006.

While in therapy, Spedden admitted having sex with at least 10 children between the ages of 2 and 15. None of the victims reported the abuse to police, Merrill Shaffer, Spedden's probation officer, said at Friday's probation violation hearing.

Clay Rundell, a sex-offender treatment specialist with Ponessa, said Spedden pledged to abstain from sexually deviant behavior, including soliciting sex from minors or using the Internet for erotica.

Spedden later told Rundell he approached boys for sex at Lancaster County Library.

"He (Spedden) approached a male minor for sex, but the boy declined," Rundell said. "He (Spedden) brushed his hand against the boy's leg in an inappropriate manner."

Rundell also said Spedden used the library's computers to view and download pornography.

Spedden told the therapists in April he would not return to the library, stalk children or view pornography, Rundell said.

John Welsh, a sex-offender therapist with Ponessa, also testified Friday.

Welsh said Spedden was given a polygraph test in August to determine if he lied during counseling.

Spedden flunked the test.

"He was not consistently honest," Welsh said. "He was blatantly dishonest about a number of things.

"He lied about viewing pornography and engaging in sexual contact with people at church," Welsh said. "He also was online at church having a sexual chat."

Spedden attended First Presbyterian Church, where he allegedly accessed the Internet. He also received counseling at the church.

"He disguised himself as a 17-year-old to have sexual chats with minors," Welsh said.

Therapy was not working for Spedden, Welsh said.

"He gave a lot of lip service about taking steps, but he was doing quite the opposite," Welsh said. "He groomed victims of sexual abuse at church — that's quite alarming."

Welsh also determined Spedden viewed pornography on computers at Franklin & Marshall College and Harrisburg Area Community College.

Lancaster city police charged Spedden with 74 counts of possessing child pornography in July 2003 after discovering about 1,000 explicit photographs on his home computer.

Police initially searched Spedden's apartment in February 2003 during a credit-card theft investigation and found pornography.

Investigators said at the time it was the largest collection of child pornography confiscated in county history.