Until recently, Massachusetts Institute of Technology biologist Kristin Knouse was regarded as a leading figure in a male-dominated field and a prominent voice associated with the #MeToo movement.
Today, however, that reputation has been severely damaged following a false rape accusation that nearly ended the career of one of the world’s most respected cancer researchers.
Knouse, 38, accused Professor David Sabatini after their casual, consensual relationship ended when he decided to pursue another woman.
It took five years for Sabatini, now 58, to clear his name.
During that time, he watched colleagues rally behind Knouse as his career and reputation were publicly dismantled.
MIT removed Sabatini in 2021 after relying on Knouse’s allegations. He became an outcast in the scientific community despite maintaining that he had done nothing wrong.
His vindication came only this fall, when he fought back in a defamation trial and used Knouse’s own text messages to challenge her account.
Sabatini won the civil case and was awarded $9.6 million after jurors found that Knouse had caused him profound emotional, financial and reputational harm.
Knouse plans to appeal. For now, though, she is facing the kind of public disgrace that Sabatini says she brought upon him.
Kristin Knouse, a researcher at the Massachusetts Institute of Technology, falsely claimed that a prominent professor she worked with had sexually assaulted her
Knouse is pictured with Professor David Sabatini. They had a consensual relationship, but after he ended it, she launched what he described as a campaign against him
Despite winning the lawsuit, Sabatini says he remains deeply affected by what happened. Speaking to Our News Outlet from his new home in Prague this week, he said Knouse had “completely destroyed my life.”
At his lowest point, Sabatini said his despair became so severe that he attempted to hang himself.
Knouse is now experiencing the consequences of the case herself.
Jurors reviewed a series of explicit messages, including one in which Knouse wrote that she wanted to “feel like” she had “been gang raped.” The messages were presented as evidence that the pair had been involved in a casual sexual relationship for roughly a year.
The evidence also challenged the account Knouse had given over several years: that she, rather than Sabatini, had initiated the relationship.
After Sabatini chose to date another woman, Knouse texted a friend about plans to get him “Weinstein-ed out of science,” invoking disgraced Hollywood producer Harvey Weinstein.
Video obtained by Our News Outlet shows Knouse being questioned about the messages during a deposition.
Sabatini’s lawyer, Lisa Arrowood, read one of the messages aloud: “I can’t wait to wake up tomorrow and feel like I’ve been gang raped.”
Arrowood then asked Knouse what she intended the message to mean.
Kristin Knouse is pictured working at MIT. She remains employed by the university despite the allegations that damaged the reputation of a leading cancer researcher
Knouse appears in a videotaped deposition, where she was questioned about messages that undermined her claims of sexual assault against Sabatini
Sabatini told Our News Outlet that he attempted to hang himself during the darkest period of the ordeal and still feels like a shadow of his former self
“We had been at the gym earlier and had done a bunch of squats,” the MIT professor replied. “I was referring to the fact that I was looking forward to feeling sore from the workout.”
The remark became another piece of evidence supporting Sabatini’s account of their relationship.
Arrowood suggested that Knouse had told Sabatini she enjoyed rough sex, citing her messages.
Knouse initially avoided a direct answer, saying she would need to review the specific examples.
“I’m asking you, did you say it?” Arrowood responded. Knouse then acknowledged: “I imagine that I would say that I was open to more, rougher, sex.”
Other messages showed Knouse pursuing Sabatini for sex on several occasions, including at 1:30 a.m. after a Whitehead Institute work retreat at a New Hampshire hotel.
Knouse had previously alleged that Sabatini made her feel “very nervous and scared” at the retreat by asking her repeatedly to have sex.
That account was contradicted by messages in which she admitted that she had “aggressively” pursued him at the hotel.
Knouse is pictured at a December 2025 hearing after Sabatini sued her for defamation. He won the civil case, and she was ordered to pay him $9.6 million
Knouse, pictured at MIT, remains employed by the prestigious university despite the controversy surrounding the case
Her account suffered another setback when therapy notes were introduced at trial. The records showed that Knouse had privately described the relationship in terms that differed sharply from her public allegations.
According to the notes, she told her therapist that she “wanted to keep feeding and fueling validation from such a powerful figure in my career” when she began her casual relationship with Sabatini, who was then considered a potential Nobel Prize candidate.
“My pursuit of obtaining an unavailable man is the ultimate validation of my perfection,” Knouse wrote in notes later admitted as evidence.
Messages to friends also showed Knouse appearing to celebrate as Sabatini’s career unraveled, despite his pioneering cancer research and ten international awards.
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In May 2021, she told one friend that she had been “a victim of egregious sexual misconduct by Sabatini,” then added: “I think he will get fired… f***ing Weinstein his ass.”
When the friend offered support, Knouse replied: “My lawyers and I are out for blood… prison is what he should get.”
After Sabatini was described in the Boston Globe and elsewhere as a suspected sexual predator, Knouse wrote that he had been “hopelessly defeated, beyond the violence stage.”
Speaking from his new laboratory in Prague, Sabatini said the messages celebrating his downfall were painful to read.
Sabatini is pictured with boxes of his belongings sent to his home after he was forced out of the Massachusetts Institute of Technology
“There is a very strong strain of maliciousness which is very hard for me to read now, given that we were together,” he said.
Sabatini said he now believes Knouse began planning against him after he told her in January 2021 that he wanted to pursue a relationship with another scientist.
The woman, who later became his wife, was living in Germany. Sabatini said Knouse initially believed the pandemic had ended the relationship.
But, he said, she “went nuclear” after learning that he had booked a flight to Germany to see his girlfriend in October 2020. Knouse then reported him to the Whitehead Institute for alleged sexual harassment.
Sabatini said he was blindsided by what followed. He claimed Knouse had spent months building her case privately, persuading members of her laboratory to support her before presenting him with the allegations.
He said the accusations soon spread across Twitter, where online activists associated with #MeToo condemned him without giving him an opportunity to respond.
Over the months that followed, Sabatini watched the scientific career he had built over 25 years collapse.
MIT President Sally Kornbluth has not commented on Sabatini’s departure from the university
The Massachusetts Institute of Technology is pictured. Colleagues turned against Professor David Sabatini after he was accused of sexual assault
He lost his positions at both the Whitehead Institute and MIT. An online campaign involving students and faculty at New York University also blocked a potential appointment he had been discussing there.
His name was removed from prominent scientific papers, and he was booed at venues where he had once been invited as a leading speaker.
Although he welcomed the court’s decision, Sabatini said the verdict could not restore the life he had before the allegations.
His marriage to the woman he chose to pursue instead of Knouse has ended, and he moved across the world in an effort to escape the public hostility.
“This has completely destroyed me and completely changed my life,” Sabatini told Our News Outlet. “Nothing that remained from before is still operating. Everything is gone.”
During the darkest period, when he said he had been forced into hiding, Sabatini attempted to take his own life by hanging himself at home.
“I fell into an extremely deep depression, something I had never had before,” he said.
“I stopped eating, lost a lot of my hair and pretty much stopped talking. Family birthday parties continued, but everyone noticed that I was catatonic.
“It was very strange to be the big raincloud over other people’s moments when you are supposed to be happy, so I felt doubly bad about that.”
Before the allegations ended his career, Sabatini had been one of the most celebrated scientists in his field.
He had received ten international awards for major advances in cancer research and was viewed by some as a potential Nobel Prize winner.
His laboratory at MIT employed 46 cellular researchers, including seven scientists who later established laboratories at Harvard.
Asked whether the fallout had delayed potentially life-saving research, Sabatini said it had.
“Certainly. The work I was doing, that was all destroyed,” he said.
“We were working on many different diseases, including cancer as well as various degenerative conditions. All of that was lost, and frankly, I don’t even know what happened to the work.
“But the world is large, and you never know where treatments are going to come from. If they were going to come from us, they were certainly delayed.”
A judge dismissed Sabatini’s claims against MIT and Whitehead Institute president Ruth Lehmann.
Knouse, meanwhile, continues to hold her position at MIT.
An MIT spokesperson said: “The Board of Directors of Whitehead Institute has full confidence in the leadership of Director Ruth Lehmann, the Institute’s workplace policies and the process that included the 2021 investigation into Sabatini’s laboratory, which was conducted by an independent law firm.
“Whitehead Institute was not a party to the lawsuit between David Sabatini and Kristin Knouse, in which a jury verdict was announced on October 16, 2026.
“All claims made by Sabatini against Whitehead had previously been dismissed by the court.”
Our News Outlet has contacted Knouse’s lawyers for comment.
