A 27-year-old Lakemoor man was found guilty Friday of sexually assaulting his former girlfriend in September 2018. McHenry County Judge Robert Wilbrandt announced the guilty verdict after a two-day trial by judge, which began Feb. 21 and resumed Friday. Kevin F. Graf is scheduled to be sentenced for criminal sexual assault, criminal sexual abuse and restraint on April 16. In making his determination Friday, Wilbrandt said he found Graf's testimony not credible.