Webb, who worked as a server at Studio Movie Grill, told police she provided customers’ credit card information to Blalock at the end of her shift. In return, Blalock paid Webb $1,000 in cash weekly, according to police.

Detectives found a portable magnetic-stripe card reader that was used “to further this crime,” Washington said. It can store data from more than 8,000 cards.

“Anyone who has visited the business during the last three months should know that their financial identity was possibly compromised,” Washington said. “Victims should immediately contact their bank and have them issue a new account number with a new ATM card number. In addition, report the crime to law enforcement.”

Anyone with information about the scam is asked to call police at 770-513-5300. Tipsters can also remain anonymous, and be eligible for the reward by contacting Crime Stoppers Atlanta at 404-577-8477, texting information to 274637 or visiting crimestoppersatlanta.org.

Know what's really going on with crime and public safety in your metro Atlanta community, including breaking news, trial coverage, trends and the latest on unsolved cases. Sign up for the AJC's crime and safety newsletter delivered weekly to your inbox.

In other news: