It's a juicy case for Durham detectives who are chewing over how to burst the bubble of the woman who's been stealing thousands of dollars worth of gum. "It's a sticky case but we've got a couple of gumshoes on it," Durham police Sgt. Paul McCurbin said. The thief's technique is simple -- she goes to large grocery stores, piles up cases of chewing gum in a cart, covers them with flyers, and then leaves. She's made off with about $5,000 worth of gum so far, police believe. She's white, in her 40s, about 5-foot-4 and 130 to 150 pounds...