CBS 5 Investigates the Baseline Killer: DNA evidence - KPTV - FOX 12

CBS 5 Investigates the Baseline Killer: DNA evidence

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The man convicted in the Baseline Killer serial murder cases claims the DNA evidence used to send him to death row was either fabricated or planted.

Mark Goudeau made the allegations in an hourslong interview he gave to a British documentary crew shortly after he was convicted. CBS 5 obtained the exclusive rights to that interview.

"Let's just face it," Goudeau said. "Let's be real with one another. People are ignorant when it comes to DNA. So they're like, 'Well, they got your DNA. It must be you.'"

Goudeau argues that the Phoenix Police Crime Lab actually ruled him out as a suspect in the string of serial killings, months before the state crime lab used the same evidence to link him to the crimes.

"The Phoenix Police Crime Lab tested Mark Goudeau's STR DNA, and I'm excluded from all items," said Goudeau.

CBS 5 Investigates examined the police reports, the DNA results and the evidence used in the trial. It turns out, the Phoenix Police Crime Lab never tested Goudeau's STR DNA because it did not have the capability to test it.

STR DNA testing allows forensics experts to more precisely identify suspects in crimes than the more basic DNA testing that was done at the Phoenix lab at the time.

The STR DNA testing took place at the Department of Public Safety Crime Lab, and rather than ruling out Goudeau, it implicated him.

Goudeau and his wife, Wendy Carr, also claim the amount of DNA evidence found at the crime scenes was so small that it could not be accurately tested.

They point to the murder of Sophia Nunez on April 10, 2006. She was found submerged in a bath tub. Swabs taken from her breast revealed the killer's saliva. It was later linked to Goudeau.

Blood spots found on Goudeau's shoe were linked to murder victim Chao "George" Chou. Another drop of blood on Goudeau's shoe and blood on a ski mask found in his home were linked to victim Kristin "Nicole" Gibbons.

Frederic Zenhausern from the University of Arizona's College of Medicine in Phoenix said even tiny pieces of evidence can reveal reliable DNA.

When confronted with the fact that there was nothing unusual about the way the investigators obtained and tested the DNA evidence, Carr alleged that the evidence must have planted by police.

"I'm arguing that there was a rush to arrest after searching our house for multiple times and not coming up with anything. They needed to do some damage control," said Carr.

For that story to be correct, it would require a conspiracy involving the largest task force in Phoenix Police history, detectives, prosecutors and crime lab technicians. It's the one theory that has no evidence backing it up.

Copyright 2013 CBS 5 (KPHO Broadcasting Corporation). All rights reserved.

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