A Fond du Lac man convicted of robbing a Fond du Lac business is going to prison. Fond du Lac judge Gary Sharpe sentenced David Haefner to four years in prison and four years extended supervision. Haefner earlier pleaded no contest to theft as a repeater. Charges of robbery, theft from a financial institution and bail jumping were dismissed and read into the record. The sentence will run consecutive to a two year prison sentence handed down for a charge of delivering illegal articles to an inmate. Police Chief Bill Lamb says Haefner robbed Heights Finance on Rickmeyer Drive. Lamb says a sheriff’s deputy later spotted the vehicle on West Johnson Street. The vehicle stopped and Haefner fled on foot. He was apprehended inside the Valvoline oil change store.