Episode Details

In 1970s Denver, Colorado, USA, a serial killer was on the loose. Over the course of 2 years, 4 women had killed in similar circumstances. When police failed to link the killings and separate investigations produced no suspects, the cases went cold. The families of the victims would have to wait 40 years to find any form of closure via an unlikely link between latest DNA profiling techniques and the 1981 killing of a rookie Denver cop. These are the crimes that took 4 decades to solve. This is the case of Joe Ervin.