joan shannon. maybe the swinger lifestyle might have had something to do with that. >> finally, a possible lead. had the shannons' unusual sex life created a motive for murder? >>> coming up, an intriguing new lead. >> david said, you need to meet my wife joan. was there a fatal love triangle in this circle of swingers? when "dateline" continues. hilarious. with claim-free rewards. switching to allstate is worth it. dray, when he was younger, he loved to smile; and we knew he would need braces because his teeth were coming in funny. that's when he had the bunny rabbits. we called him the bunny rabbit. now, those are the same two front teeth, there, that they are now. then dray ended up having to wear braces for 5 years because he never made it