Mr. Chambers, who pleaded guilty on Friday to first-degree manslaughter in the death of Jennifer Levin, faces a prison term of 5 to 15 years.

He and Ms. Grossberg pleaded guilty to manslaughter charges for their part in the death.

Robb pleaded guilty in November 2007 to voluntary manslaughter in the high-profile death of his wife, Ellen Gregory Robb.

Peterson pleaded guilty in 1998 to manslaughter, along with his girlfriend, in the death of their newborn son at a motel in Delaware.

On June 29, 2009, Bell pleaded guilty to voluntary manslaughter in the death of Young.

Sylvia Hernandez, who pleaded guilty last month to manslaughter in the death of her newborn, was sentenced yesterday to seven years in prison.

The woman, Rebecca Diaz Groom, 30, pleaded guilty to first-degree manslaughter in the death of her son Saleem.

On March 27, 2006, Butler pleaded guilty to voluntary manslaughter and arson in the 2004 death of Kellerman.

Mr. Sandlin, who is serving a life sentence in Florida for armed robbery, has pleaded not guilty in the death of the boy.

LEAD: An 18-year-old transient has pleaded not guilty in the death of a motorcyclist whose throat was slashed by a cable stretched across a bridge.