RALEIGH (WTVD) -- Former Fort Bragg doctor Jeffrey MacDonald filed a motion Thursday seeking a new trial in the murder of his wife and children more than 40 years ago.
In the filing, MacDonald claims there is new evidence to support a new trial.
"The defense learned of the existence of handwritten lab notes that revealed numerous blond synthetic hairs, up to 22 inches in length, had been found in a hairbrush in the kitchen of the MacDonald home following the murders," according to court documents.
"These hairs could not be matched to any known items in the MacDonald home," the documents went on to say. "The analyst who testified as a government witness at the trial never mentioned finding these long blond synthetic hairs. Synthetic hairs possibly coming from a wig would have been powerful corroborating evidence of intruders as Dr. MacDonald's consistent accounts of the evening included a female intruder who appeared to be wearing a wig with long blonde hair."
The court filing claims FBI agent Michael P. Malone submitted a false affidavit claiming the hairs were from a doll, not a wig.
MacDonald, who was convicted in 1979 in the murders of his pregnant wife and two daughters in 1970, has tried numerous times to get a new trial, each time being denied.
In July, a judge rejected a new trial request that cited new DNA evidence.
The Jeffrey MacDonald case was famously profiled in the book "Fatal Vision."