(MT. VERNON, IL) – A registered sex offender has been arrested after an investigation by the Jefferson County Sheriff’s Office discovered a social media account that was created by the offender.  On Wednesday, William Miller was arrested for violation of the Sex Offender Registration Act for creating a Facebook account. Miller was transported to the Jefferson County Justice Center for the formal filing of charges and the setting of bond and trial date.  Miller is presumed innocent until proven guilty in a court of law.