A West Manchester Township man who possessed more than a half-million images of child pornography has been sentenced to 20 years in federal prison.

Lawrence B. Blevins Jr., 44, no street address provided, was sentenced Thursday in Harrisburg's federal court, according to a news release from the U.S. Attorney's Office.

Blevins was found guilty in November of two counts of receipt of child pornography, according to online court records. His trial lasted three days, according to the U.S. Attorney's Office..

Internet porn: A jury determined Blevins downloaded child pornography — including images and videos of children having sex — from the Internet, according to court documents.

Blevins caught the attention of West Manchester Township Police while they were investigating a network of people who were sharing child porn online, officials said.

On Dec. 29, 2011, police raided Blevins' home and seized computers and computer equipment.

Police found more than a half-million images of child pornography and hundreds of videos of child pornography, federal prosecutors said. He was indicted in September 2012, records state.

Sharing network: Also involved in the investigation into the child-porn-sharing network were Northern York County Regional Police, the federal Project Safe Childhood program and Homeland Security.

Blevins' federal public defender, Thomas Thornton, could not immediately be reached for comment.

In his sentencing memorandum, Thornton argued for a sentence that gave Blevins an eventual chance at release.

"Lawrence Blevins does not deserve to die in prison for sitting alone in his room at a computer and falling victim to impermissible desire," the memorandum states. "The file sharing program he clicked on gave him more than could ever be expected or be used."

In July 1998, Blevins pleaded no contest in York County Court to indecent assault and was sentenced to 23 months of probation, according to court records.

— Reach Liz Evans Scolforo at levans@yorkdispatch.com.