A federal judge has sentenced a former Sevier County judge to nearly four years in prison for having child pornography on an office computer.

Ronald R. Reagan was sentenced Thursday by U.S. District Court Judge Thomas Phillips to 46 months in prison and 10 years supervised release after pleading guilty to possessing child pornography.

Investigators said Reagan had more than 100 images on a computer at his law office that showed children engaging in intercourse and other sexual acts.

Reagan, who had been a General Sessions and Juvenile Court judge for more than a decade, is free on $200,000 bond awaiting his federal prison assignment.

Authorities had sealed all the documents in the case until Thursday. Reagan had been interviewed at his law office in March 2006 by members of the Knoxville Police Department Internet Crimes Against Children Task Force.

Investigators said he acknowledged receiving child pornography via e-mail after an Internet chat room discussion.

Scott Green, Reagan's attorney, had asked the judge to sentence Reagan to probation.