BOSTON -- Home Depot is redoing background checks on 38,000 installers nationwide, after a Team 5 Investigates report exposed that the home improvement giant sent a convicted sex offender into a single woman's home to remodel her kitchen.

NewsCenter 5's Sean Kelly reported Friday that Home Depot executives first heard about Robert Clark after the Team 5 Investigation. Kelly traveled to Atlanta to update the progress of the screenings.

The case started months ago, when Home Depot sent Clark to Niki Lebrecque's home, even though he was not a licensed contractor. Court records show he has "an extensive history of violent attacks."

"I thought, Well, of course this is a large national company," Lebrecque said. "Of course they're going to be doing sufficient background checks."

Clark has now registered as a sex offender in New Hampshire. Lebrecque found out about his troubling past while he was inside her home. He did not harm her physically, but she can't forget his presence.

"I asked for a kitchen, and I never thought I was going to get a sex offender," she said.

At Home Depot's headquarters in Atlanta, company officials would not give Team 5 Investigates a precise timeline for when every installer would have a background check redone.

Gary White, vice president of the At Home Services division, said the company has upgraded the background check process. He said installers won't be rescreened immediately but over a period of time.

"We don't want to verify it once. We want to verify it multiple times throughout the year," White said. "In the process itself we did not identify anyone specifically with a background of Robert Clark."

Kelly: "Have you found anyone who has a felony record?"

White: "We prefer not to get into details as it relates to what we've discovered in the individual audits. I can tell you that we have identified a few installers that we have taken action on."

Since our initial investigation, Team 5 Investigates has also identified a couple of people working for Home Depot who have criminal records and are still working for the company, despite the new policy.

"If they should not be doing business with Home Depot, we will make sure they are no longer in a customer's home and no longer do business with the Home Depot," White said.

The president of U.S. Remodelers, the company that hired Robert Clark to work for Home Depot, assured Team 5 Investigates that no one is taking background checks lightly even though mistakes do happen. He said his company has spent more than $10,000 to rescreen installers doing work for Home Depot.