ROCK FALLS – A Whiteside County attorney was arrested Thursday after an investigation into an alleged sexual assault of a client. The Illinois State Police conducted a search warrant on two locations to gather evidence to corroborate a victims claim that 63-year-old Michael A. Lancaster assaulted and restrained her. His office in Sterling and his home in Rock Falls were both searched. Lancaster was taken to the Whiteside County Jail where he is being held on $150,000 bond on two counts of Criminal Sexual Assault (Class 1 Felonies) and one count of Unlawful Restraint (Class 4 Felony). The Whiteside County State’s Attorney’s office stated that they are deferring the case to the Rock Island County State’s Attorney office to avoid any perception of conflict of interest.