COEUR D'ALENE, Idaho (AP) -- Detectives who questioned a man in the killings of three people ruled him out as a suspect Thursday and said they still had no idea where two children missing from the family's home were. The man, Robert Roy Lutner, 33, of Hayden, voluntarily took and passed a polygraph test during a seven-hour interview with investigators, Kootenai County sheriff's Capt. Ben Wolfinger said. Lutner said he saw the three alive when he attended a "barbecue-type get-together" at their rural home Sunday night, less than 24 hours before the bodies were found. "He had nothing to do...