While He Was Sleeping Dateline : Season 23 Episode 66
TV-PG NBC 1h 42m
Aired: June 26th, 2015 @ 9:00 PM EST on NBC
Correspondent Josh Mankiewicz reports on the death of a wealthy luxury car dealer, who was found murdered in his sleep, as one chance clue reopens the cold case and enables detectives to dig further into his past with one of his many lovers.
