Killers and criminals from around the world part two

By 2001 the crime lab finally had access to the technology to conduct DNA tests, and the county mayor sent some samples to a geneticist for analysis, which consisted of semen taken from three of the victims. Scientists have proven that the semen belongs to one man, and when it is matched with the saliva taken from Ridgway, the result is completely identical .. Finally, the authorities were able through science to identify the serial killer who puzzled them for 20 years.