A Washington state woman said she is offering a reward for the return of a diamond ring she accidentally dropped into a trick-or-treater's bag. Joan Collins of Camus said she remembered the 2-karat diamond ring getting caught on a plastic pumpkin being carried by a young girl, one of the about 300 trick-or-treaters who visited her home Halloween evening, KPTV, Portland, Ore., reported Thursday. "It snagged, but I didn't feel it come off," she said. "The next day, I said, 'Oh, I don't have my ring on.' I started thinking back and the only thing I could think of was...