HILLSBORO, Ore. -- A man who kidnapped two women and held them as sex slaves was sentenced Friday to 108 years in prison.

Vance Roberts, 52, was found guilty in June.

In 1991, Roberts and his brother were accused of kidnapping young prostitutes and bringing them back to their home in Hillsboro, where authorities said they set up an elaborate sexual torture chamber.

Prosecutors said the women were forced to engage in demeaning and abusive sex for days at a time. They also said Roberts beat the women and threatened to kill them.

Police said Roberts and his brother installed soundproofing and put bars on the inside of the windows so no one could escape. But Roberts said he paid the women extra for engaging in bondage and claimed they all agreed to it.

Roberts and his half brother Paul E. Jackson were arrested in June 1990 after one of the women ran for help and reported she had been held as a sex slave.

Both men skipped out on their bail in February 1991. Roberts turned himself in last September, saying he was tired of running from something he didn't do.

Jackson, who is now 37, remains at large.