stacia grossman got word from her mother. >> my mother called and said "michelle is dead."aid, "michelle who? some celebrity? like, what are you talking about? what do you mean, how is that possible? what happened?" >> the very question that wake county investigators are asking themselves. >> a security camera provides a critical clue. it's not what it caught. it's what it missed and why. >>> coming up -- >> it was a camera there that had been unplugged. >> really? >> yes. it was one of the side exits of the hotel. >> who had something to hide? when "silent witness" continues. . hard work baby, it gonna pay off. >>> welcome back. what was once a quiet home in the suburbs of raleigh, north carolina, was now a horrifying crime scene bustling with activity. four months pregnant, michelle young had been murdered. and investigators were eager to talk to her husband, jason, but would jason talk to them? here's keith morrison. >> the facts were stark and ugly. one night in november, 2006, while her husband was away on business, michelle young was attacked in her bedroom and brutal

stacia grossman got word from her mother. >> my mother called and says "michelle's dead."d, "michelle who? some celebrity? like what are you talking about? what do you mean, how is that possible? what happened?" >> reporter: the very questions that wake county investigators were asking themselves. >> as the investigation gets under way, a security camera provides a critical clue. it's not what it caught. it's what it missed and why. >> coming up -- >> there was a camera there that had been unplugged. >> really? >> yes. it was one of the side exits of the hotel. >> who had something to hide? when "silent witness" continues. ♪ and if you feel, ♪ like i feel baby then come on, ♪ ♪ oh come on ♪ let's get it on, applebee's. now that's eatin' good in the neighborhood. (coughing) need a change of scenery? kayak searches hundreds of travel sites and filters by cabin class, wi-fi and more. so you can be confident you're getting the right flight at the best price. kayak. search one and done. it's a revolution in sleep. the sleep number 360 smart bed, from $999, intelligently senses

stacia grossman got word from her mother. >> my mother called and said "michelle is dead."d, "michelle who? some celebrity? like what are you talking about? what do you mean, how is that possible? what happened?" >> reporter: the very question that wake county investigators were asking themselves. >>> as the investigation heats up, a security camera provides a critical clue. it's not what it caught, it's what it missed and why. >>> coming up -- >> there was a camera there that had been unplugged. >> who had something to hide? when "dateline" continues. telin. with uncontrolled moderate-to-severe eczema, telin. or atopic dermatitis, you never know how your skin will look. and it can feel like no matter what you do, you're always itching. but even though you see and feel eczema on your skin, an overly sensitive immune system deep within your skin could be the cause. so help heal your skin from within. with dupixent. dupixent is not a steroid, and it continuously treats your eczema even when you can't see it. at 16 weeks, more than 1 in 3 patients saw clear or almost clear ski