Forensic science is biased and inaccurate, but juries believe it and convict the innocent


DNA Testingsource: Slate.com 
published: 11 June 2014

Nine days before death row inmate Earl Washington’s scheduled execution, his lawyers informed the state of Virginia that it was about to murder an innocent man. Forensic analysis of semen introduced at trial had convinced the jury that Washington, whose mental abilities matched those of a 10-year-old, had brutally raped and murdered a young woman in 1982.

Washington’s lawyers uncovered evidence that the analysis was faulty. The state halted the impending execution, and following a gubernatorial pardon, Washington was released from prison in 2001. He had been there for 17 years.

How could forensic evidence, widely seen as factual and unbiased, nearly send an innocent person to his death? The answer is profoundly disturbing—and suggests that for every Earl Washington freed, untold more are sent to their deaths.

Far from an infallible science, forensics is a decades-long experiment in which undertrained lab workers jettison the scientific method in favor of speedy results that fit prosecutors’ hunches.

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