
This episode discusses the Spokane serial killer cases from 1990 to 1997, featuring detectives Jim Hanson and Jim Dresback, and the eventual identification of Donna Perry as the killer.
The episode begins with the discovery of three murdered prostitutes in Spokane, Washington, whose cases went unsolved for decades. Detective Jim Hanson shares his involvement in the investigation, highlighting the challenges faced due to the victims' backgrounds.
Jim Dresback later took over the cases and discusses the similarities between the murders, which suggested a serial killer. The investigation faced numerous obstacles, including a lack of DNA technology at the time.
In 2012, the arrest of Donna Perry, a woman with a violent past, leads to a breakthrough when her DNA matches that found on one of the victims. The episode details Perry's troubled history and the psychological factors that may have influenced her actions.
The detectives reflect on the complexities of the case, including Perry's gender reassignment and how it played a role in the investigation. Ultimately, Perry is found guilty of the murders, with the episode emphasizing the importance of the evidence collected by the victims during their struggles.
The episode reveals Donna Perry as the Spokane serial killer of three prostitutes, detailing the investigation and her eventual conviction.

This episode stands out for the following:
The prostitute is still a person, they've got family.Making a Serial Killer - Season 1, Episode 4 - Donna Perry and the Killer Within - Full Episode
This is a huge breakthrough.Making a Serial Killer - Season 1, Episode 4 - Donna Perry and the Killer Within - Full Episode
Just who is Donna Perry?Making a Serial Killer - Season 1, Episode 4 - Donna Perry and the Killer Within - Full Episode
Douglas didn't stop, Donna stopped it.Making a Serial Killer - Season 1, Episode 4 - Donna Perry and the Killer Within - Full Episode
I would never have anything to do with a Black person.Making a Serial Killer - Season 1, Episode 4 - Donna Perry and the Killer Within - Full Episode
It was her fighting instincts that collected the evidence that put Perry in prison.Making a Serial Killer - Season 1, Episode 4 - Donna Perry and the Killer Within - Full Episode