FOX Sports has learned that the NFL has zeroed in on a New England Patriots locker-room attendant in connection with the scandal of improperly inflated footballs used in the AFC championship game against the Indianapolis Colts.

The person of interest was already interviewed by the league. The NFL is trying to determine whether any wrongdoing by this individual occurred, sources tell FOX Sports.

There is surveillance video showing the attendant taking the footballs from the official’s locker room into another room at Gillette Stadium before bringing them out to the field, sources tell FOX Sports.