WATCH - Cold case: Investigators look for break in Circle K clerk’s 2009 murder in Douglas County “The case may be unsolved, but the victim is not forgotten.” - Special Agent in Charge Brian Whidby The GBI Cold Case Unit spoke with WSB-TV’s Mark Winne about the 2009 murder of Maryanne Humphrey in Douglas County. Maryanne worked as a store clerk at the Circle K at the intersection of Highway 5 and West Stewart Mill Road. She was murdered during a store robbery on September 21, 2009. Watch the FUL