A forensic specialist testified Wednesday that DNA from serial predator suspect Mark Goudeau matched biological samples from a 2005 sexual assault that was part of the “Baseline Killer” investigation.
Police arrested Goudeau shortly after Lorraine Heath’s analysis in August 2006. They charged him with attacking two sisters on Sept. 20, 2005, and later added 74 other criminal counts including nine slayings.
Authorities accused Goudeau of being the Baseline Killer, a serial predator who randomly attacked people in the Phoenix area between August 2005 and June 2006.
Goudeau, a 42-year-old former construction worker, has pleaded not guilty to all charges against him.
If convicted on all 19 counts in his sexual assault trial, Goudeau faces from 70 to 280 years in prison. Goudeau’s trial for the remaining counts has not yet been scheduled.
Heath told Maricopa County Superior Court jurors Wednesday that Goudeau was almost undoubtedly the source of male DNA found on the left breast of one of the sisters.
“Mark Goudeau’s DNA is on this left breast,” Heath said. She added that it is 360 trillion times more likely that the DNA is Goudeau’s “than if it was an unrelated African American man along with the sisters.”
Defense lawyer Corwin Townsend pointed out that Heath’s analysis showed only a partial match. Under cross-examination, Heath agreed that Goudeau’s DNA was consistent with only three of 13 genetic markers.
“The term I would use is that he cannot be excluded” for the remaining 10 markers, Heath said. “If he could be excluded, I would not be here making these statements.”
Forensics specialists working for police were able to retrieve only small amounts of male DNA from biological evidence in the rape kit. Heath said she could make an identification only after consuming evidence found on the left breast.
Townsend has said that he’s skeptical of the police DNA analysis.
He pointed out in court that Heath, who was a Department of Public Safety investigator, was working closely with police on the Baseline Killer case when she identified Goudeau.