The North Carolina Office of the State Auditor is expanding its investigative capabilities with new technology and increased production. In this episode of “Let’s Add It Up,” State Auditor Dave Boliek sits down with Deputy State Auditor Beth Ray, who oversees the Investigative Division. The former prosecutor explains how her team uses the Tipline to investigate potential fraud and gross waste of taxpayer dollars, a process that involves feeding a town's credit card statements into a computer model that flags suspicious transactions.