Were sandy ketchum or holly Harvey ever on Dateline NBC?

Sandy Ketchum and Holly Harvey are not known for being featured on Dateline NBC. Dateline typically covers true crime stories and real-life events, and while many individuals have appeared on the show, there is no significant information linking either Ketchum or Harvey to episodes of Dateline. If you are looking for specific cases or episodes, it might be helpful to provide more context or details.