in their bedrooms. here comes a monster into your house. i just broke down, you know? i just couldn t imagine who would want to do this? reporter: then, t happened again to another mother, another daughter. somebody s killing mothers and daughters? that s about as scary as it gets. as scary as it gets. reporter: who was out there? and who would be next? it s something you would never imagine would happen. reporter: the clues would lie here, an abandoned mansion, eerie. haunting. where was this killer hiding? cold, calculating eyes, lifeless. he was almost a ghost. reporter: could they catch him? could they stop him? i get chills all over. i m kindof on the edge of my seat. he truly thought he could outsmart us. reporter: i m lester holt, and this is dateline. here s dennis murphy with the unusual suspect. mo nt the cozy word home, and all it evokes. security. got it? and now reflect on what happens when those four walls are breached, when night
the clues would lie here, an abandoned mansion. eerie, haunting. where was the the killer hiding? cold, calculating eyes. lifeless. he was almost a ghost. could they catch him? could they stop him? i get chills all over. i m kind of on the edge of my seat. he truly thought he could outsmart us. i m lester holt, and this is dateline. here s dennis murphy with the unusual suspects. reporter: consider for a moment that cozy word home and all it evokes warmth, family, shelter, security. got it? now reflect on what happens when those four walls are breached. when nightmares cross the window and kicks in the door. when a haven becomes a house of horrors. so how does that feel? just ask lloyd irvin. i m laying on the couch. i wake up, and there s two gunmen holding guns over me, pointing them, holding them down, you re being robbed. don t move. more than six years have passed since that night in august, 2008, here out the nation s capital in a nice neighb
and who would be next? it s something you would never imagine would happen. the clues would lie here an abandoned mansion. eerie. haunting. where was this killer hiding? cold, calculating eyes, lifeless. he was almost a ghost. could they catch him? could they stop him? i get chills all over. i m kind of on the edge of my seat. he truly thought he could outsmart us. i m lester holt and this is dateline. here s dennis murphy with the unusual suspect. reporter: consider for a moment the cozy word home and all it evokes. warmth, family, shelter, security. got it? and now reflect on what happens when those four walls are breached, when nightmare stuff crawls through the window, kicks in the doors. when a haven becomes a house of horrors. so, how does that feel? just ask lloyd irvin. i m laying on the couch. i wake up and there s two gunmen over top of me holding guns, pointing em at me, like, holding down. you re being robbed. don t move. reporter: mor
and who would be next? it s something you would never imagine would happen. the clues would lie here an abandoned mansion. eerie. haunting. where was this killer hiding? cold, calculating eyes, lifeless. he was almost a ghost. could they catch him? could they stop him? i get chills all over. i m kind of on the edge of my seat. he truly thought he could outsmart us. i m lester holt and this is dateline. here s dennis murphy with the unusual suspect. reporter: consider for a moment the cozy word home and all it evokes. warmth, family, shelter, security. got it? and now reflect on what happens when those four walls are breached, when nightmare stuff crawls through the window, kicks in the doors. when a haven becomes a house of horrors. so, how does that feel? just ask lloyd irvin. i m laying on the couch. i wake up and there s two gunmen over top of me holding guns, pointing em at me, like, holding down. you re being robbed. don t move. reporter: mor