The Cook County Sheriff's Department launched a Halloween initiative Wednesday to make sure that registered sex offenders were in compliance.

Patch published a map of where registered sex offenders live in Des Plaines earlier this month.

Officers conducted un-scheduled address verification premise checks for sex offenders in Cook County and Ford Heights, a press release states.

Last month, registered sex offenders were sent a letter advising them of their duty to report to the sheriff's department headquarters in Maywood on Halloween between 3 p.m. and 8 p.m. The time was chose because it corresponded to traditional trick-or-treating hours, a press release stated.

During the scheduled reporting time, all sex offenders will participate in the following activities:

• Re-registered (providing all current personal information)
• Re-photographed (current photo)
• A CCSPD Sex Offender Law Tutorial video, will be viewed by each sex offender (30 minutes)

Information submitted by the Cook County Sheriff's Department.