CLEVELAND, Ohio – A Columbia Station man was sentenced Tuesday to 20 years in prison for child-pornography crimes linked to the solicitation of nude photographs and blackmail of cast members of the "Billy Elliot" Broadway musical.

U.S. District Judge John Adams sentenced William Koch, 25, to prison for 18 charges, including production of child pornography, child exploitation, extortion, identity theft, receipt and distribution of minors engaged in sexually explicit conduct, and unauthorized distribution of live musical performance.

According to an FBI affidavit, between 2010-13, Koch attempted to coerce more than a dozen boys to engage in sexually explicit conduct on recordings.

The FBI affidavit recounted how Koch created a fake Facebook account, posed as a 15-year-old girl, then contacted members of the Broadway musical, who he enticed into sending him nude videos and photographs.

Koch later used the pornographic images to blackmail the boys, according to the court documents.

"Send me a nude or else I will make your life a living hell," Koch threatened in an online text message sent to one of his victims, a 13-year-old boy.

Koch was arrested in January 2013, and struck a plea agreement with federal prosecutors in October of last year.