It bends my mind that even after an interview with Nations' wife, he still remains Schrodinger's Murderer, who can neither be ruled out as the killer or confirmed as the killer.
Despite this there are definitely some interesting tidbits from this interview. KN thinks he was with her on the day of the murders but she's not sure (that's on LE to now contact where she got the ultrasound, to try to either confirm or deny this) and also is adamant the video Abby and Libby took doesn't look like her husband. I don't think DN watching the news and seeing what happened to Abby and Libby is particularly interesting in itself since I'd imagine anybody from Indiana would have been hard pressed to avoid hearing about the murders but at least we know he had some sort of interest in following the case.