DALLAS (CBS Dallas) – Huggies never felt so dirty. A kids-in-diapers fetish for one former employee of the Dallas Independent School District has landed him a prison sentence of more than 11 years.

Thomas Roussin, 46, was sentenced to 135 months in federal prison late last week, almost five months after he pleaded guilty in federal court for transporting and shipping child pornography. The Fort Worth Star-Telegram reported that Roussin also faces five years of supervised release.

In September 2011, an undercover Plano police officer located files on an online file-sharing program from the username “TXDRYPER,” tipping off the officer that there might be child pornography, according to federal documents obtained by the Dallas Morning News. When the officer tracked lewd photos of young nude boys back to Roussin, FBI agents searched his home before he admitted to trading images “with about 30 friends,” according to court records.

Roussin, who worked for the Dallas school system in an unspecified role, admitted that his primary interest was viewing children in diapers. He also conceded to having photos of nude children, according to a news release from the U.S. Attorney’s Office.

The sentence concludes another bizarre federal child pornography case in the area. In October 2011, CBS Dallas reported that a Dallas-area kindergarten teacher was sentenced for sexual misconduct with students, a case that also included an alleged diaper fetish.