Timothy Wilson Spencer was the first person convicted in the United States based on DNA evidence. DNA evidence collected from the body of Susan Tucker eventually led to the arrest and conviction of Spencer, who had raped or killed several other women in the same manner. The detective in Susan Tucker's case was relentless in his determination to capture the person responsible for these crimes and have them meet justice. He was relentless in his determination to have DNA evidence used. Without the efforts of Detective Joe Horgas, the sacrifices of these victims, and all of the scientists and members of the justice system who advocated for the use of DNA evidence, there would be far fewer people held responsible for their actions. DNA technology has advanced so much since this case, it is really amazing to see.