For nearly two decades, one of the nation’s most prolific serial killers haunted the Pacific Northwest as a clueless specter of death, known only by his infamous nickname: The Green River Killer.
Even though a massive team of investigators was assembled to track him down, the identity of the killer remained a mystery throughout the 1980s and ’90s, while dozens of girls and women disappeared from the streets around Seattle, leaving only wild waste. To come in months or years later in the form of corpses or bones.
Then, in late 2001, when the case had gone cold and the killings had stopped, authorities announced the arrest of a commercial truck painter named Gary Ridgway. He attributed the big break in the case – what he said cut Ridgway out of a pool of 1,300 potential suspects – to advances in DNA fingerprinting techniques that did not exist at the height of the murders.
But an NBC News investigation reveals that the long-held narrative that forensic science caught up with the Green River Killer is false.
Nearly 20 years before Ridgway was arrested, the Washington State Patrol Crime Laboratory ignored key microscopic evidence found on the clothing of its first victim — and seven others — according to interviews and documents obtained through the public. Thousands of pages reviewed. record request. Small areas of a unique industrial spray paint that linked Ridgway to his murders in the 1980s could be traced, forensic scientists involved in the case recently admitted, to at least some of his 49 confirmed murders. stopped the
Even some longtime investigators assigned to the case said in interviews that until now, they were in the dark about missed opportunities to catch the killer sooner.
“I’m afraid I didn’t know that was even possible,” said Commander Frank Adamson, a retired King County sheriff who oversaw the Green River Task Force in the mid-1980s. “It would have been nice if we could have saved a life or two – or all of them.”
A renowned trace evidence expert, brought in to help with the case, found the undiscovered clue in 2003, only after a DNA match led to Ridgway’s arrest. The spray paint found on the victims’ clothing was not sold to the public and was used on a wide scale in the early 1980s by the Kenworth Truck Company only in the Seattle area where Ridgway worked.
Officials publicly lauded the discovery as another scientific breakthrough. This pressured the lead detectives into four previously undiscovered bodies in exchange for Ridgway confessing to 48 murders and avoiding the death penalty.
But in a recent interview, trace evidence expert Skip Palenque said he could have done the same analysis in the 1980s with the use of an infrared microscope. And he almost had his chance, he said.
Palenque said that in 1985 when he visited the Washington crime lab to train staff members in searching for incriminating evidence, the director said that if investigators identified a suspect he would bring them on the case.
But Palenque said the director never called. Seventeen years later, he said, “I got a call that they wanted us to look into this case. And we got all the information we could get”.
Jeff Baird, the retired King County senior deputy prosecutor who led Ridgeway’s prosecution and eventually brought Palenque on the case, said in a recent interview that he never heard of Palenque’s visit to the crime lab in the 1980s. Hadn’t heard of or knew the paint areas. Got it then.
“It is very conceivable that if those things had been examined more carefully at the time, the investigation would have taken an earlier, more productive turn that pointed directly to Ridgway,” Baird said.
When asked about the overlooked evidence, a spokesperson for the Washington State Patrol Crime Lab said in an email that “after so much time has passed, we are unable to speculate on the mindset and specific investigative strategies of past forensic leaders so many years ago.” Hesitating from.
Chesterin Kwiklik, the scientist who oversaw the lab’s trace evidence work at the time, admitted in a recent interview, “We’ve never seen those really fine particles that Skip did.”
The sisters of Patricia Yellow Robe, Ridgway’s last known victim, said the revelations were disturbing but made no sense now.
“Had it been offered to us at a different time, there might have been an outcry,” said the Rona Yellow Robe. “But there’s been a lot of time and space and treatment that I don’t want to give up on something I can’t control.”
1982–86: Decisions about evidence
In July 1982, the body of Ridgway’s first known victim was pulled from the Green River in suburban Seattle, with a pair of blue jeans tied around her neck.
Embedded in the denim used to strangle 16-year-old fugitive Wendy Lee Coffield were tiny balls of spray paint that would take more than two decades to locate.
After four more bodies were found in and along the Green River within a month, the King County sheriff assembled a task force to track down a serial killer.
The killer continued to prey on vulnerable women and girls, many of whom had run away from home or were involved in street prostitution, leaving the bodies in remote woods. Investigators compiled a list of hundreds of possible suspects and accumulated a mountain of evidence from dumpsites, turning most of the material over to state forensic scientists for analysis.
Ridgway first came to the task force’s attention in 1983, when 18-year-old Maria Malvar disappeared after getting into a pickup truck with a man on Pacific Highway South. Her boyfriend and pimp later saw the same truck in front of Ridgway’s house and reported it to the police.
Ridgway told a detective that he knew nothing about Malver’s disappearance, but that he kept re-emerging in tips and brushes with sex workers over the next several months. He willingly spoke with detectives and admitted that he had been arrested previously for soliciting a prostitute. He said that he continued to regularly pick up street girls and had even encountered two of the killer’s presumed victims. But he denied harming them. In 1984, he agreed to take a lie detector test – and passed.
By then, the killer had left behind important microscopic evidence that could help identify him, records and interviews show him. Along with the jeans used to strangle Coffield, paintballs stuck in the weave of the fabric were eventually found along with seven other bodies and bones, records show. a purple shirt. a pair of jeans. Black knitted sweater.
But with the volume of evidence, staffing shortages, and the workload of other cases across the state, crime lab officials had to choose which evidence to analyze, said Cwiklik, the lab’s trace evidence supervisor at the time.
Cwiklik said in a recent interview, he opted to focus on the analysis of hairs and fibers, which “would have generally been most fruitful”.
The analysts assigned to the case “really did an amazing job” sorting, analyzing, and comparing thousands of different hairs, fibers, and pieces of paint and other collected debris, she said.
But focusing the analysis on hair and fibers meant the lab “basically neglected” the tiny particles and dust on clothing and other items, Cwiklik said.
In early 1985, Ridgway again drew suspicion when another woman reported that a man who had shown her his Kenworth employee identification card had tried to strangle her in 1982 after paying for sex. He bit her. According to the detective’s report, the woman declined to press charges.
In the same year, Palenque, a renowned trace evidence expert, became aware of the matter. Palenik, then a senior researcher at the Chicago-based Macron Research Institute – a leader in microanalysis – taught workshops around the country. Palenque said in a recent interview that he had just finished teaching a basic forensic microscopy course at the crime lab in Seattle when then-director George Ishii told him about the Green River murders.
Before leaving town, Palenque said, Ishii, vowed to seek his help when he came across a suspect. But he never heard again about the matter from Ishii, who died in 2013. Ridgway is known to have murdered at least four women after 1985 when Palenque visited Seattle.
“Imagine in ’85, when I was out there, if George sent this stuff back to us, we would find and recognize areas as having this unusual urethane paint,” Palenque said. “And then when they bring in a suspect and it’s Gary Ridgway — well, where does he work? He works at a place where he sprays the same unusual paint on trucks all day.
But without that forensic test, Ridgway slipped through the grasp of investigators and kept on killing.
1987–90: ‘We should have done it
By 1987, Ridgway’s penchant for prostitutes and past brushes with known victims, and other tips were enough to help investigators obtain warrants to search his home, vehicles, and workplace.
In an affidavit, investigators wrote that they wanted to compare trace evidence collected from various dumpsites that could be tied to Ridgway, including green polyester carpet fibers and aluminum fragments.
But the seized hairs, fibers, clothing, and other evidence did not definitively tie Ridgway to any of the victims, and he slipped back into the pile of suspects as the decade ended.
Later, Cwiklik said, the crime lab should have shifted its focus from hair and fibers to analyzing smaller particles in trace evidence recovered from dumpsites.
By 1990, Cwiklik said, the crime lab was using an infrared microscope, which was capable of detecting finer detail than an optical microscope. For years, the lab had been using techniques to capture even tiny bits of trace evidence that could have helped trace the paint splatter, he said. But they would still need an outside expert, such as Palenque, to identify them and trace their source, she said.
“In fact, we were able to find these things, but we didn’t because we didn’t see the tiny, tiny fractions,” she said. “It always bothered me that we didn’t do it, but it would be hard to argue that we should make it a priority.”
“But later, when nothing was fruitful,” he said, “we should have done it.”
1990s: A Rejected Request
By the early 1990s, when a new wave of bodies and bones were found, the Green River Task Force had already been disbanded. But a small group of detectives who feared the killer was still on the job quietly kept the investigation alive. They focused on one prime suspect: Ridgway.
In November 1992, detectives formally requested that the crime lab compare hairs collected from Ridgway with those recovered from the new wave of victims, according to a memo from a detective at the lab obtained through a public records request. . But crime lab officials, who by then had spent years analyzing hairs and fibers in the case in vain, dismissed the request as a futile effort, said retired King County sheriff’s detective Tom Jensen.
Jensen, who has devoted much of his career to the case, was recently stunned to learn from an NBC News reporter that the ability to trace paint areas linking Ridgway to some victims had existed years earlier.
Laboratory officials never mentioned to detectives that small particles of trace evidence had not been analyzed, he said.
“I think if we had known about it we would have tested,” Jensen said. “We were doing everything we could to come up with one piece of evidence.”
As the 90s wore on, Jensen was left to investigate the Green River murders as the leads ran dry.
Jensen’s list of the killer’s suspected victims grew to nearly 90, including dozens of homeless or drug-addicted girls and women who disappeared or were dumped in remote locations in western Washington.
Near the end of the decade, the killings seemed to stop. But he didn’t.
When the body of Patricia Yellow Robe was found in bushes outside a wrecking yard south of Seattle in 1998, she was not believed to be the killer’s victim. The medical examiner ruled his death an accidental overdose.
Yellow Robe grew up in Montana as the eldest of nine siblings who were prone to alcoholism. By age 38, she had been in and out of rehab and suffered from chronic health problems. Police records show he spent his last days couch-surfing and frequent body-diving.
When the Sisters of the Yellow Robe saw his body at the funeral home, they became suspicious of how he had died. “She looked beaten up,” recalled Rona Yellow Robe, remembering the bruises on her face. A deputy discounted it at the time, telling Rona that the injury was a by-product of her sister’s “lifestyle”.
2000s: To Catch a Killer
By 2001, improvements in DNA science allowed the crime lab to better analyze smaller and poorer genetic samples. This prompted Jensen to present evidence collected from the bodies of several victims, as well as evidence Ridgway had chewed when the warrant was issued in 1987.
With new technology, scientists were finally able to match DNA from Ridgway’s saliva to sperm recovered from two victims found in the river in 1982 and another victim from the dumpsite in 1983.
Based on the results, Ridgway was arrested and charged with the felony murders of all three victims, as well as those found only a few feet from both of them in the river. He pleaded not guilty, claiming through his lawyers that he had “dated” – but had not killed – the victims linked to him based on their DNA.
As he prepared to put Ridgway on trial, Baird, King County’s lead criminal prosecutor on the case, enlisted several outside forensic laboratories in 2002 to help examine the mass of evidence in the case. By chance, Baird said, he “stumbled upon” Palenque, who by then was running his own lab, MicroTrace, which had worked on high-profile cases including the Unabomber investigation and the Atlanta child murders.
For the next several months, MicroTrace analyzed paint collected from Ridgway’s home, workplace and vehicles to create a reference library, and then compared it to paint fragments collected in or near the dumpsites where the victims were found Was. Nothing matches.
So Palenque decided to change tactics: cleaning dust from the clothing of suspects and victims and analyzing the tiny particles under a microscope equipped with an infrared device used to detect dyes and the composition of substances.
Since the late 1970s, Palenque had been regularly using the vacuuming process along with such infrared equipment to find and identify small particles that helped investigators solve cases. In 2003, he used similar techniques with modern versions of the equipment when he analyzed Ridgway’s clothing and items with the 13 Green River victims.
After vacuuming the clothing, they pulled the tiny particles captured into special vacuum filters and then used an infrared spectrometer to identify them as unusual multicolored paint areas. They found shells from five of the victims on Ridgway’s clothing and clothing. They matched.
Palenik soon determined that the shiny acrylic urethane spheres were air-drying droplets of a specific commercial automotive spray paint made by DuPont and called Imron.
Company chemists later informed Palenque that DuPont had patented the high-end, specialty product and believed that no one else in the world was making paint with Imron’s unique composition or pigments.
Palenque said some of the victims’ clothing contained “dozens and dozens of spray-paint spheres” in blue, green, red, orange, and white. “And it’s not normal.” He said this indicated the shells came from a source that is widely used, DuPont Imron, and in a variety of dyes.
The paint was not sold to the public in 1982, and Kenworth, where Ridgway worked, “was the only place in the Seattle area using this spray paint on a large scale in the early 1980s,” he said.
After Palenque informs Baird of his findings, prosecutors charge Ridgway with three more murders, which takes his defense team by surprise.
One of his lawyers, Mark Prothero, later wrote in a book that even though his team underestimated the paint areas, “prosecutors could find nothing worse for our client than a woman strangled.” Less than a Polaroid picture.”
Baird recently described Palenque’s findings as “pivotal.” The paintballs were “very, very powerful evidence” that, for Baird, was superior to DNA in many ways because it was “not an arcane or highly technical forensic science, but still very convincing on a visceral level,” They said.
“These women were not employed in a paint store or involved in spray-painting activities, so the common thread was someone who was directly linked to Kenworth,” he said. “It’s much more intuitive and accessible for a juror to make that connection. It’s common sense.
Shortly after the additional charges were filed, defense attorneys contacted prosecutors with an offer. Ridgway might agree to remember murders committed in King County and secretly help investigators find more victims if prosecutors sentenced him to death.
Palenque said Baird called and confessed: “‘You can’t tell anyone about this, but what if I told you that based on your report, Ridgway has confessed to being the Green River Killer? “
Over the next five months, Ridgway detailed his murders and led detectives to locate the remains of four victims, including Malvar, whose disappearance had earlier alerted police in 1983. After a detective sent more clothing to Palenque, he found paintballs tied to three more victims, bringing the total to eight.
Ridgway told detectives that the paint sometimes covered his face and work clothes when he sprayed it on the cabs of semi-trucks in Kenworth. He said he often went on “patrolls” for sex workers immediately after work.
Sometimes, he would go to lengths to avoid detection, including biting off the fingernails of victims who scratched him before disposing of their bodies. But he left behind some of his victims’ clothing, left at dumpsites or wrapped around their necks like a ligature. “They were just rags to me,” he told detectives. “Just rags.”
In November 2003, King County Prosecutor Norm Maleng announced a plea deal that sent Ridgway to the Washington State Penitentiary in Walla Walla, where he is serving 49 life sentences. (Ridgeway, 74, did not respond to an interview request sent to him in a letter to the prison.)
Without the deal, more than 40 of Ridgway’s murders most likely would have gone unsolved, Maleng said.
Among them was the murder of Yellow Robe, the last woman Ridgway said she could remember being killed.
2023: Learning the Whole Truth
The sisters of Patricia Yellow Robe mourned their loss in 1998 when they were told she would be procuring.
But he still privately questioned whether Trisha—the peacemaker of the family who aspired to be a seamstress, sang Supremes songs, and snorted when she laughed—had really died.
He finally came to know the truth in late 2003 with a phone call from a newspaper reporter.
At first, Luana Yellow Robe said, she thought the caller dialed the wrong number. He told that Trisha had died of an overdose five years ago.
Until that day, prosecutors had kept the details of Ridgway’s confession a secret even from her, a paralegal in their office.
The truth was that his sister had been strangled and she was counted as the last of Ridgway’s victims.
Luana said that when her anger and shock wore off, her family’s doubts about Trisha’s death finally made sense.
Following Ridgway’s confession, the medical examiner’s office accepted that Trisha may have been strangled, despite toxicology results that revealed large amounts of opium and alcohol in her bloodstream.
“She wanted us to know the truth,” said the weeping Yellow Robe, “and I’m glad I know it.”
Luana and Rona recently learned that truth from an NBC News reporter, which now includes another detail: the tiny, unseen piece of evidence that could tie a killer to his crimes long before he murdered his sister.
“Does it annoy me?” Luana asked. “It’s too bad they didn’t do what they should have done. But being angry now won’t make my sister come back.