(CNN) An Internal Affairs investigation ordered by Palm Beach County Sheriff Ric Bradshaw will look into his deputies' supervision of multimillionaire Jeffrey Epstein, who is accused of inappropriate sexual contact during his 13-month jail sentence.

Sheriff Bradshaw "wants to determine if any actions taken by the deputies assigned to monitor Epstein during his work release program violated any agency rules and regulations, during the time he was on PBSO work release program," according to a news release.

Epstein negotiated a non-prosecution agreement with federal prosecutors in 2007, which reduced federal sex-trafficking charges in exchange for a guilty plea to lesser state crimes.

That agreement meant that during his 13-month sentence in 2008 and 2009, he was allowed to leave jail to work in an office 12 hours a day, six days a week.

During that time, victims' attorney Bradley Edwards alleged, Epstein was engaging in inappropriate sexual acts.

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