Carolyn Bryant (right) said she lied about 14-year-old Emmett Till groping and harassing her in a MS store.
Till's murder, and the acquittal of his killers by an all-white jury, helped to spur the Civil Rights movement.
In the Deep South, where racism was still violent as well as pervasive, Bryant and Milam took it upon themselves to abduct the young teen. Bryant's husband and a second white man later tracked Till down and shot and bludgeoned him to death - and were acquitted by an all-white, all-male jury after an hour's deliberation.
But Donham told author Timothy B Tyson, "that part's not true", referring her claim that she had been harassed, according to Vanity Fair.
Emmett Till's body was found in the muddy Tallahatchie River.
Bryant went into hiding after the trial - divorcing and marrying twice more - and remained mum on the case until she gave the interview with Tyson.
Donham claims she couldn't remember anymore the rest of their brief encounter. She said that while she was unable to utter the "unprintable" word he had used. She is now 82 years old and her whereabouts have been kept secret by her family, according to Vanity Fair.
The Blood of Emmett Till comes out next week. She also said she felt "felt tender sorrow" for Till's mother, Mamie Till Mobley, but stopped short of repenting. Both her ex-husband and brother-in-law are deceased.
Virginia Beach mom and children missing over 3 days found safe
Police confirmed that the Jeep was spotted traveling through the tunnel. "I just want her to come home safe". Every family member who WAVY spoke with said the same thing - it was unlike Monica to leave like this.
Messages left with Donham and her relatives for comment on Tyson's book were not returned Friday.
He said Donham's views on race had changed over the years, along with much of the country's.
"That case went a long way toward ruining her life", Tyson told Vanity Fair.
Many Emmett Till tweets are outraged that a white woman's lie led to the brutal murder of a black teenager. His mother even insisted on an open-casket funeral, leading to photographs of his battered corpse being spread across the country, which helped focus public attention on what was happening in the heart of the country.
But hey, maybe her acknowledgment of Emmett Till and her own lies will allow us to properly look into the darkest parts of our history and push ourselves into action, particularly at a time when the nation seems more at odds than ever.
"Nothing that boy did could ever justify what happened to him", Donham told the author.
For the first time, the woman who testified she was "scared to death" after Emmett Till grabbed and threatened her has admitted she made it up.
Reports also state that she approached Tyson because she was writing her memoirs and claims she felt grief after she "herself lost one of her sons... she thought about the grief that Mamie must have felt and grieved all the more".