When The Evidence Lies

Joyce Gilchrist helped send dozens to death row. The forensic scientist's errors are putting capital punishment under the microscope

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Jim Fowler has been struck twice by lightning. A retired house painter in Oklahoma City, Okla., Fowler lived through his 19-year-old son Mark's arrest in 1985 for murdering three people in a grocery-store holdup. Mark was sentenced to death. A year later Fowler's mother Anne Laura was raped and murdered, and a man named Robert Lee Miller Jr. was sentenced to die for the crime. The same Oklahoma City police department forensic scientist, Joyce Gilchrist, testified at both trials. But DNA evidence later proved she was wrong about Miller. He was released after 10 years on death row, and a man previously cleared by Gilchrist was charged with the crime. Fowler can't help wondering if Gilchrist's testimony was equally inept at the trial of his son Mark, who was executed in January.

Last week gave Fowler even more reason to wonder. A state judge ordered a man named Jeffrey Pierce released after serving 15 years of a 65-year sentence for rape. Gilchrist placed him at the scene of the crime, but DNA evidence proved he was not the rapist. In response, Oklahoma Governor Frank Keating launched a review of every one of the thousands of cases Gilchrist touched between 1980 and 1993, starting with 12 in which death sentences were handed down. But in another 11 of her cases, the defendants have already been put to death. The state is giving the Oklahoma Indigent Defense System $725,000 to hire two attorneys and conduct DNA testing of any evidence analyzed by Gilchrist that led to a conviction. A preliminary FBI study of eight cases found that in at least five, she had made outright errors or overstepped "the acceptable limits of forensic science." Gilchrist got convictions by matching hair samples with a certainty other forensic scientists found impossible to achieve. She also appears to have withheld evidence from the defense and failed to perform tests that could have cleared defendants.

It's a bitter convolution of fate that Gilchrist should be based in Oklahoma City, the last place one would expect to find compelling arguments against the death penalty. Her story can't help but give Oklahomans pause about the quality of justice meted out by their courts. Says Gilchrist's lawyer, Melvin Hall: "The criticism of her around here is second only to that of Timothy McVeigh." But the allegations also underscore a national problem: the sometimes dangerously persuasive power of courtroom science. Juries tend to regard forensic evidence more highly than they regard witnesses because it is purportedly more objective. But forensic scientists work so closely with the police and district attorneys that their objectivity cannot be taken for granted.

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