Synopsis As Introduced Amends the Criminal Code of 2012. Provides that it is unlawful for a sex offender to knowingly reside within one mile (rather than 500 feet) of the victim of the sex offense regardless of the age of the victim at the time of the offense (currently, the prohibition only applies to child sex offenders and does not apply when the victim attains 21 years of age). Provides that nothing in this provision prohibits a sex offender from residing within one mile (rather than 500 feet) of the victim if the property in which the sex offender resides is owned by the sex offender and was purchased before the effective date of the bill, unless otherwise prohibited by law before the effective date of the bill. Provides that for the purposes of this provision, "sex offender" includes a "child sex offender". Provides that a violation is a Class 4 felony. Amends the Unified Code of Corrections to make conforming changes.