Starkweather, 19, first killed a clerk who refused to sell him a stuffed animal on credit.
Starkweather later fatally shot the parents of his girlfriend, Caril Ann Fugate, then strangled her 2-year-old sister.
Police showed up six days later and the couple fled, killing anyone in their path, including a family friend and two teenagers who assisted them on the side of the road.
Starkweather surrendered after he was cut by glass during a gunfight.
Starkweather died in the electric chair. Fugate was paroled after 17 years in prison.
- Scott McCabe