doug bradford. he vaguely remembered something lynn mentioned in s letter. >> saying that doug was no longer coming to the wedding. >> okay. >> and he was on the backburner. i put it out of my mind because i had all this wedding to organize. i knew -- obviously, he didn't light her fire too much. >> reporter: this was the first bit of heat on a cold trail. they gave doug a call. he lived with his parents. he sounded shy but agreed to meet at the house. where, it turned out, doug bradford had a lot to say. coming up -- it's the kind of tricks cops always use in a movie. >> they are not going to tell him that she's dead. when'dateline'continues. we do it every night... do it with cascade platinum plus. one load of dishes in the sink uses 24 gallons of water while a dishwasher uses less than 4 per cycle. so do it with cascade... the surprising way to save water. ♪ every search you make ♪ ♪ every click you take ♪ ♪ i'll be watching you ♪ - [narrator] the internet doesn't have to be so creepy, the duckduc