When questioned by authorities, David Gore confessed that he and his cousin abducted and ultimately killed five other women and teens. As reported by Justia, Gore initially signed a plea agreement — which stated he would plead guilty to three counts of first-degree murder and testify against his cousin Fred Waterfield. In exchange, he would be sentenced to life in prison as opposed to the death penalty. However, as Gore was determined to be an unreliable witness, he was not called to testify against Waterfield, and the plea agreement was ultimately revoked. Although Gore attempted to make another plea agreement with prosecutors, he was ultimately convicted on six counts of first-degree murder and sentenced to death. 

Daily Mail reports Gore spent 28 years on death row before he died by lethal injection at 6:19 p.m. on April 12, 2012. However, as is the case with most serial killers, people still wanted to know what motivated Gore to commit such heinous crimes. While he was on death row, Gore received a letter from a man named Tony Ciaglia, who was curious about what motivated Gore to abduct and kill so many women and girls. Over the course of several years, Ciaglia received nearly 200 pages of correspondence from the convicted serial killer.

Source: