For the past couple of weeks neighbors in the Providence Downs South community have talked about a man named Robert Smith who has been going door-to-door.

He is trying to get them to sign up for his business called "Poop Van Scoop." It's a service to come and clean your pet's waste from your yard.

But it is who Robert Smith is that has neighbors concerned.

"We've heard he is a sex offender and he is driving a car with 'pooper scooper' on the side of it," said resident Rob Thomas.

Smith is a registered sex offender. He lives in Lincoln County and investigators say he has been driving from Lincoln County to Union County, where he's been putting fliers in mailboxes and stopping people on the street.

A family in Charlotte reported to police this past weekend that a man had approached their children, ages 7 and 8, and wanted to talk about his business. The children's mother said police told her it was likely Smith.

Those who have seen him driving around say Smith uses a black or dark colored sedan with ads on both doors for "Poop Van Scoop."

"I'm happy that gates are going up at Providence Downs South," said resident Sue Spatz.

Construction is under way to install gates, but according to the Union County Sheriff's Office, Smith and any other sexual offender has every right to go door to door advertising for business.

"Poop Van Scoop" is owned by Cathy Pearson, who is Smith's mother. She says she understands the concerns and because questions have been asked about her son, he has decided to move to Chicago as soon as possible.

Neighbors in Providence Downs South say they are glad to hear that, but add they will keep a wary eye out.

Susan Spatz said, "People really care for their children here. They don't let them out of their sight."