24 years later, Danni's sister learns the terrible truth. "48 Hours" correspondent Peter Van Sant reports. ALL NEW: 10/9c: The "No Body" Case of Dee Warner: When a woman disappears, her children ...

Fourteen years ago, on a snowy evening in Philadelphia, Ellen Greenberg was found dead on the kitchen floor of her apartment. She had 20 knife wounds and numerous bruises. Authorities ruled her ...

Fourteen years ago, on a snowy evening in Philadelphia, Ellen Greenberg was found dead on the kitchen floor of her apartment. She had 20 knife wounds and numerous bruises. Authorities ruled her death ...