A man from Olathe, Kan., has pleaded guilty to possessing more than 12,000 images of child pornography.

James Christmas, 45, pleaded guilty to one count of possessing child pornography.

In his plea, he admitted he possessed more than 12,000 images and 26 videos of child pornography on computer media, according to a news release from U.S. Attorney Barry Grissom.

The investigation began in September 2010 when his estranged wife told the Olathe Police Department that she found child pornography on computer media belonging to Christmas. Investigators obtained a search warrant and found the images.

The National Center for Missing and Exploited Children identified more than 1,300 images of known child victims living outside of Kansas in the collection.

Sentencing is set for August 12. Christmas faces a maximum penalty of 10 years in federal prison and a fine up to $250,000.