An investigation by Michigan State University has concluded an infamous sports doctor sexually assaulted a 15-year-old gymnast during treatments for back pain in 2000.

Lawyers for Rachael Denhollander released the report Tuesday night. Based on interviews with Denhollander and others, the report — by the university Title IX investigator — says Larry Nassar did not have consent to touch her sexually.

The Lansing State Journal reports it is the first ruling that has agreed with any of the at least 80 women or girls who have sued Michigan State and Nassar over sexual assault allegations.

“To me, this is the watershed moment in this case,” said attorney John Manly, who represents Denhollander and dozens of other alleged victims of Nassar. “These families want justice. A civil lawsuit is great, but you shouldn’t have to hire a civil attorney to get justice.”

Nassar was interviewed last September, just days before he was fired by Michigan State. He couldn’t recall his visits with Denhollander, but he denied anything improper. He wondered why she didn’t complain. The final Title IX investigative report indicates Nassar sexually assaulted her, including digital penetration and massaging of the genital area and breast.

Another Title IX investigation by Michigan State nearly three years ago, involving similar allegations against Nassar, cleared the longtime university doctor.

Nassar and Michigan State are being sued by dozens of females, including Denhollander, who has publicly identified herself as a victim. Nassar also faces criminal charges for sexually assaulting 10 girls and possessing child pornography. He’s in jail without bond.

“It’s been incredibly painful, to be honest,” Denhollander said, according to the State Journal, of using her name in the lawsuit against Michigan State. “What was more important was that he was stopped, that the culture of abuse was challenged, and the women who were living in silence could come forward.”

A Michigan State spokesman declined comment to the newspaper.

With AP