There are 99 registered sex offenders that live in Muskogee, and over the next three days, teams will run a sex offender check on each of them.
Muskogee police officers and U.S. Marshals are going door to door to make sure sex offenders are living where they say they are.
Muskogee Officer Jeramie Garcia and U.S. Marshal Misty Stewart are one team of many canvassing the city, checking to make sure sex offenders have their address and other information up to date.
Sex offenders are supposed to check in with police every 90 days to keep their records current, but not everyone follows the rules, according to Officer Lincoln Anderson.
"If a parent has a small child and a sex offender lives two doors down, they want to know and we want to be able to let people know," he said.
He and U.S. Marshal Dustin Ramsey are another team working in Muskogee.
One of the offenders they checked on was living where he said, but he had a warrant for unpaid fines so they took him into custody.
They were looking for a woman who raped someone in another state but learned she may have moved to Kentucky. There was also a man who had committed child sex crimes in Texas.
The teams said they won't stop until they've contacted every person in all their files.
"You better be in compliance or hope we can't find you," Anderson said.
For sex offenders found not in compliance with the law, the officers and marshals will get warrants for them, come back and take them to jail.