North Carolina ? The hair of a former Army doctor convicted in the slayings of his wife and two daughters was found in his dead wife’s hand, according to long-awaited results of DNA testing made public Friday.

Testing of another hair, under the fingernail of Jeffrey MacDonald’s youngest daughter, showed that it came from an unidentified person, a find that MacDonald’s supporters say bolsters his case.

MacDonald asked for the DNA testing in 1997, claiming it would help prove that a band of crazed hippies killed his family in 1970, while he was stationed at Fort Bragg. But federal prosecutors said in a statement Friday that the testing found no DNA from either the man or the woman MacDonald named as suspects.

For years after the slayings of Colette MacDonald, 26; daughter Kimberley, 6; and daughter Kristen, 2, MacDonald was free because the Army said it didn’t have enough evidence to prosecute him. A federal jury in Raleigh convicted him in 1979 after the U.S. Justice Department reopened the case.

The trial led to a best-selling book, “Fatal Vision,” and a television miniseries of the same name.