ramirez's husband opened their door to an army casualty notification team. and the worst news imaginable. their karlyn was dead. >> what did they say? >> we regret to inform you. just like they always say. same words. they had a chaplain with them. and couldn't give me any specifics. i asked for the baby. they said that she was in the hospital. >> so what scenarios are running through your mind? >> i couldn't even imagine what could have possibly happened. >> the answers would come 1,700 miles away at karlyn's town house in maryland. homicide detectives kelly harding and dan meyers of the anne arundel county police department were on the case. >> a maintenance person saw a dog walking around into an open back door of the townhome. he called 911. and the officers got there. and karlyn ramirez had been murdered. >> patrol officers led the detectives to a second-floor