As it is the anniversary of her passing this is my take on Debbie’s case, which I recently elaborated on in book form.
She was murdered by a serial killer. And not just any serial killer, a serial mass murderer, one later known as Zodiac, the one not just me but others have theorized was behind murders elsewhere prior to his killings in the Bay Area.
His name was William Thoresen III. He was the son of a millionaire when a million bucks was still a million bucks. Adjusted for inflation his family were near billionaires. He drove a Ferrari, dated Playboy Playmates and hoarded weapons by the ton. Even if he hadn’t killed a fly his story is a case of rich dysfunction the likes I have not heard equalled by anyone. Unfortunately, however, he was a killing machine and he used his money, family’s status and looks for all they were worth.
Most notably he killed upwards of 50 people (a conservative estimate) in six states (also a conservative estimate.) He was from Kenilworth, Illinois. I came across him while investigating the Valerie Percy murder. After many years of extreme abuse, his wife blasted him to kingdom come. After all he did he got off easy.
Perhaps most important, in order to protect the jobs and reputations of numerous people in the justice system, his crimes were covered up and proof abounds of this (as I have also detailed in my latest book.) Yes, one of his victims was the daughter of a US Senator. The story is unbelievable. But, as far as this case goes, these are the facts:
Debbie was last seen talking with a man who was in a white car. Thoresen inherited a white Chevy Corvair in Chicago in late 1965.
One of Thoresen’s MOs was to talk people into his car, as police believe happened with Debbie.
The FBI believed Thoresen was a prime suspect in the murder of Valerie Percy.
Like Debbie, Valerie was slain in 1966.
Like Debbie, Valerie was slain in the Chicago suburbs.
Like Debbie, Valerie was stabbed repeatedly.
Like Debbie, Valerie was slain in a place where murder, let alone random murder, is unheard of.
Debbie was stabbed about the head, neck and upper body.
Valerie was stabbed in the neck, body and bludgeoned in the head.
I obtained a copy of Thoresen’s signature. It looks like writing on an envelope linked to the murder of presumed Zodiac victim Cheri Jo Bates.
Like Debbie and Valerie, Cheri Jo was slain in 1966.
Like Debbie, Cheri Jo was last seen at her school.
Like Debbie, Cheri Jo was stabbed about the head, neck and upper body.
Like Debbie, Cheri Jo was stabbed with a small-bladed knife.
Debbie’s body was left beside a road.
Cheri Jo’s body was left beside an alley.
Witnesses in Valerie and Cheri Jo’s cases described a suspect who fits Thoresen’s description. (Valerie’s stepmother was an eyewitness to her murder.)
The Zodiac Killer was active in San Francisco and the greater Bay Area.
From 1965 to 1970, Thoresen’s primary residence was in San Francisco.
Thoresen was a frequent traveler to Southern California, where Cheri Jo was murdered, starting in 1962.
The handwriting on an envelope linked to the Bates case looks like handwriting in a letter written to an Illinoian whose daughter and daughter's boyfriend were murdered in May, 1969, a time it has been assumed Zodiac was up to no good…somewhere.
Thoresen was a suspect in the murder of Judith Mae Anderson in Chicago in 1957. Anderson’s body was “neatly severed” while being dismembered.
Thoresen had numerous arrests for violent assaults. His wife said he was behind the murders of three people, including his brother whose body was found in Lake Forest, IL five months before Debbie's murder.
Officials have refused to release reports from Valerie and Debbie’s cases.
In Valerie’s case, five years ago, the village of Kenilworth spent a considerable amount of money fighting an FOIA suit a lawyer filed in order to gain access to the case’s files.
Meanwhile, there is no marker on Debbie’s grave.
I’ve revealed more on Thoresen on this site in the Serial Killers/Zodiac Killer section (a thread called Don’t Count Him Out.) Included are images of the documents referenced above.
But this one’s for you, Debbie.