Raleigh, N.C. — The hair of a former Army doctor convicted in the slayings of his wife and two daughters was found clutched in his dead wife's hand, according to long-awaited results of DNA testing made public Friday.

Jeffrey MacDonald asked for the DNA testing in 1997, claiming it would bolster his argument that a band of crazed hippies killed his family in 1970, while he was stationed at Fort Bragg. But federal prosecutors said Friday in a statement the testing didn't find any DNA from either of the two women named by MacDonald as suspects.

Both MacDonald's lead attorney, Tim Junkin, and his current wife, Kathryn, said they believe at least one piece of evidence uncovered during the DNA testing will help MacDonald's case. A hair from an unidentified person was found under the fingernail of MacDonald's youngest daughter, Kristen.

And while it doesn't match the women MacDonald identified as suspects, they said it bolsters MacDonald's argument there were at least two other unidentified assailants in the MacDonald home during the attack.

"This is the time we've waited for for so many years," said Kathryn MacDonald, who married the imprisoned MacDonald in 2002. "This is just one more layer of evidence that shows that there were assailants in the house."

Junkin called the unidentified hair "a powerful piece of evidence that there were intruders in the house that night."