and i am asking myself, who in the world is albrecht muth? >> the day after viola's death, muth agreed to vo lup taluntary questioning by homicide detectives. what muth didn't know is they already believed viola had been murdered, and he was a prime suspect. >> now, yesterday, can you tell me how you found your wife and when's the last time you saw her? >> i last saw my wife the afternoon of thursday. >> you go -- you go to the bathroom, what did you see? >> my wife on the floor. >> did you attempt to give her any cpr? >> nope. the obvious was obvious. >> for almost an hour, detectives listen to muth's story. and then, they sprang their trap. >> medical examiner performed the autopsy today. >> and the result? >> clearly, the medical examiner's office believes that it is a murder. >> okay. >> the medical examiner discovered that viola had suffered multiple, severe injuries. she had a fractured neck, fractured ribs, a bruised scalp, and a torn fingernail. the injuries were consistent with a violent struggle. viola's death was ruled a homicide. >

>> on the line was a man named albrecht muth. >> i need the police to come quickly. i have just found my wife dead on the bathroom floor. >> okay. she's not breathing? >> no. she is clearly dead. can you, please, send the police? >> muth's wife, viola draft, was 91 years old when she died. veteran detective, bobby jackson, was one of the first to arrive at the scene. he was part of what the metropolitan police department called the natural squad. >> the homicide guy squads, they work murders. we investigate all the other deaths in the city, other than homicides. suicides, industrial accidents, natural deaths, overdoses. >> so, when this gets called in as 91-year-old woman who's dead in her bathroom in georgetown, what does that sound like to you? >> a natural. >> but detective jackson needed