In December of 1980 college sweethearts, John Riggins and Sabrina Gonsalves were heading to a birthday party but never arrived. The fog was thick that evening so family members feared they had gotten into an accident. What actually happening was much worse.
The case marked the first time the Sacramento Sheriff's Dept. videotaped a crime scene. Carol Daly, then one of only a handful of female homicide detectives on the force, was behind the camera. Watch the Carol recording the scene of the crime.
More about the murder of college sweethearts.
Here's a 30-year timeline of the case from beginning to end.
Judge sentences the college sweethearts to death.
Watch 48 hours episode about the case.