Four-time Olympic gold medalist Simon Biles breaks her silence on Twitter, revealing that she has been sexually harassed by former USA Gymnastics Team Doctor Larry Nassar.

“After hearing the brave stories of my friends and other survivors, I know that this horrific experience does not define me,” wrote the 20-year-old. “I am much more than this. I am unique, smart, talented, motivated, and passionate. I have promised myself that my story will be much greater than this,” a part of her long note posted on Twitter.

In November, Nassar confessed to abusing gymnasts undergoing medical treatments.

On Tuesday, one of the victims named Kyle Stephens testified to the court how she was abused by Nassar between the ages of six and 12.

“Perhaps you have figured it out by now, but little girls don’t stay little for ever,” a tearful Stephens said. “They grow into strong women that destroy your world.”

Aside from Biles and Stephens, some of the girls who appeared as victims by Nassar were Olympic champions Aly Raisman, McKayla Maroney, and Gabby Douglas.

The USA Gymnastics and Michigan State University have faced heavy criticism for their handling of the case as four athletes had already reported Nassar’s abuse to Michigan State in the late 1990s, according to ESPN. Furthermore, a criminal investigation was launched for Nassar in July 2014 but the doctor continued to see patients at MSU for 16 months.

On Monday, USA Gymnastics offered support for Biles but did not comment on allegations it had failed its athletes, according to The Guardian. “USA Gymnastics is absolutely heartbroken, sorry and angry that Simone Biles or any of our athletes have been harmed by the horrific acts of Larry Nassar,” it said in a statement.