Sarah Klein, an attorney, advocate for victims of sexual assault and the first known survivor of the abuse of former sports doctor Larry Nassar, spoke Monday after he was stabbed in prison.

Nassar, who has served decades in prison, was stabbed to death during an altercation with another inmate at a Florida federal prison, according to sources familiar with the matter. One person told the Associated Press that Nassar had been stabbed in the back and chest.

Federal officials confirmed to Fox News Digital that a stabbing occurred around 2:35 p.m. ET Sunday and staff members initiated life-saving measures. One inmate was taken to a local hospital for further treatment. Authorities did not identify the victim or the assailant.

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Sarah Klein speaks about the sexual assault of Larry Nassar at the espnW Summit held at the Resort at Pelican Hill on October 2, 2018 in Newport Beach, California. (Meg Oliphant/Getty Images)

Klein later released his statement.

“This assault on Nassar does not bring peace to me personally or to the survivors I spoke to today. The incident forces us to vividly relive our abuse and trauma at the hands of Nassar and the institutions, including law enforcement, that protected him and him. allowed him to take advantage of the children,» Klein wrote.

“I want him to face the severe prison sentence he received because of the voices of the survivors. I absolutely do not support violence because it is morally wrong and death would be an easy way out for Nassar. I urge the Department of Justice and the Bureau of Prisons to see that Nassar is not allowed to escape his sentence and the consequences of his horrific crimes.»

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Klein is a former competitive gymnast and was a child when Nassar began abusing her. She received the Arthur Ashe Courage Award for having the courage to speak out about the abuse she faced.

Sarah Klein at the ESPYs

Honoree Aly Raisman, gymnast Jordyn Wieber, Tiffany Thomas Lopez and Sarah Klein attend the 2018 ESPY Awards ceremony on July 18, 2018 in Los Angeles. (Alberto E. Rodriguez / Getty Images)

She is now considered a mother figure to survivors of Nassar’s abuse and an advocate for others facing similar circumstances. In addition, she is a civil and trial lawyer at Manly, Stewart & Finaldi.

Nassar is serving decades in prison for sexually assaulting gymnasts, including Olympic medalists. He admitted to sexually assaulting athletes when he worked at Michigan State University and USA Gymnastics.

He also pleaded guilty to possession of child pornography.

During victim impact statements in 2019, several athletes testified that over the course of Nassar’s more than two decades of sexual abuse., they had told coaches and trainers and other adults what was going on, but it was not reported.

Larry Nassar in 2018

Larry Nassar, former Michigan State University and USA Gymnastics doctor, listens during the sentencing phase in Eaton County Circuit Court on January 31, 2018 in Charlotte, Michigan. (Jeff Kowalsky/AFP via Getty Images)

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Nassar will likely spend the rest of his life behind bars.

Associated Press contributed to this report.