The WaPo ran a whole set of articles about it, each more interesting and disturbing than the last.

Justice Department officials have known for years that flawed forensic work might have led to the convictions of potentially innocent people, but prosecutors failed to notify defendants or their attorneys even in many cases they knew were troubled.

Officials started reviewing the cases in the 1990s after reports that sloppy work by examiners at the FBI lab was producing unreliable forensic evidence in court trials. Instead of releasing those findings, they made them available only to the prosecutors in the affected cases, according to documents and interviews with dozens of officials.

In addition, the Justice Department reviewed only a limited number of cases and focused on the work of one scientist at the FBI lab, despite warnings that problems were far more widespread and could affect potentially thousands of cases in federal, state and local courts.

As a result, hundreds of defendants nationwide remain in prison or on parole for crimes that might merit exoneration, a retrial or a retesting of evidence using DNA because FBI hair and fiber experts may have misidentified them as suspects.

With regards to the case of Santae Tribble, who was convicted based largely on the analysis of a hair found on a stocking the perpetrator wore during the crime. Here's what it turned into:

Details of the new round of hair testing illustrate how hair analysis is highly subjective. The FBI scientist who originally testified at Tribble’s trial, Special Agent James A. Hilverda, said all the hairs he retrieved from the stocking were human head hairs, including the one suitable for comparison that he declared in court matched Tribble’s “in all microscopic characteristics.”

In August, Harold Deadman, a senior hair analyst with the D.C. police who spent 15 years with the FBI lab, forwarded the evidence to the private lab and reported that the 13 hairs he found included head and limb hairs. One exhibited Caucasian characteristics, Deadman added. Tribble is black.

But the private lab’s DNA tests irrefutably showed that the 13 hairs came from three human sources, each of African origin, except for one — which came from a dog.

“Such is the true state of hair microscopy,” Levick wrote. “Two FBI-trained analysts, James Hilverda and Harold Deadman, could not even distinguish human hairs from canine hairs.”

Jolly good work, lads.

-- Convicted defendants left uninformed of forensic flaws found by Justice Dept.

-- DOJ review of flawed FBI forensics processes lacked transparency