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Wayne Williams, convicted of many of the Atlanta child murders

From CNN.com:

Three decades ago a string of murders of African-American children terrorized Atlanta, Georgia, and gripped the nation. Tune in to “The Atlanta Child Murders” with Soledad O’Brien on Thursday at 8 p.m., and later at 11 p.m. and 2 a.m. ET.

The documentary also will be reaired: Saturday June 12: 8 p.m., 11 p.m. and later at 2 a.m., and Sunday June 13: 8 p.m., 11 p.m., and later at 2 a.m.

Almost 30 years ago, when Wayne Williams went on trial in two deaths that became known as the Atlanta child murders, DNA testing was not yet a staple of courtroom science.

Now it is. And new results have implicated Williams in the death of at least one 11-year-old victim.

When Patrick Baltazar’s body was found dumped down a wooded slope behind an office park on February 13, 1981, a forensic scientist discovered two human scalp hairs inside the boy’s shirt.

At trial, scientists from both the FBI and Royal Canadian Mounted Police would testify that, under a microscope, the hairs were consistent with those of Wayne Williams. But that was only a matter of judgment, not exact science.

In 2007, defense lawyers for Williams raised the question of DNA testing on dog hairs which were on bodies of many of the 27 boys and young men found dead during the two-year murder spree.

At the same time, the judge decided to allow those two hairs found on Baltazar to be sent to the FBI’s DNA laboratory at Quantico, Virginia.

The laboratory report found the scalp hairs had the same type of DNA sequence as did Wayne Williams’ own hair.

“I don’t think they said it was a match,” Williams told CNN. “I think they said [they] could not rule out whoever the hairs were from as being the possible donor.”

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But retired FBI scientist Harold Deadman, who testified about the hair findings in Williams’ 1982 trial and later became head of the FBI’s DNA lab, said it was the strongest finding possible with this particular type of testing.

“It would probably exclude 98 percent or so of the people in the world,” Deadman said.

Of 1,148 African-American hair samples in the FBI’s data base, the FBI said only 29 had the same sequence — in other words, only 2½ of every 100 African-Americans.

The FBI report said this: “Wayne Williams cannot be excluded as the source of the hair.”

The finding is not ironclad. Because the hairs were incomplete, the type of testing, called mitochondrial DNA, can trace only the maternal line. Only with nucleic DNA testing, which includes paternal lineage, could the results be absolutely conclusive.

When CNN showed the DNA results to victim Baltazar’s stepmother, Sheila Baltazar, she said, “Without a shadow of a doubt, I really in my heart believe Wayne Williams killed Patrick Baltazar.”

Read the full story here.

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