12/23/2011 02:20 pm ET Updated Dec 23, 2011

Missouri Sex Slave Case: Bradley Cook Pleads Guilty To Torturing Female Victim

A Missouri real estate broker pleaded guilty on Tuesday to charges surrounding an eight year scandal in which several men held captive a mentally disabled teenager as a sex slave.

Bradley Cook, of Kirkwood, agreed to serve a 20-year sentence as part of his plea bargain with prosecutors, The Kansas City Star reports.

The 33-year-old, known online as "PutHer2GoodUse," admitted to witnessing and participating in sexual abuse against a woman, now 25, known only as "Female Victim" in court documents obtained by KSDK.

Another defendant and the accused ring-leader, Edward Bagley, persuaded the 16-year-old girl in 2002 to mary him and move into his trailer, the New York Daily News reports.

From 2002 through 2009, Cook, Bagley, and at least four accomplices engaged in "horrific torture" of the girl by whipping her, confining her to a cage, shocking the girl with electric devices, and selling footage of the torture on the Web for profit, according to The Kansas City Star.

Authorities discovered the case after the victim suffered a heart attack during an electric shock session and was forced to be hospitalized.

Cook is charged with sex trafficking of a child by force and is still awaiting sentencing.