Captain of the gold-medal winning 2012 and 2016 US women's Olympic gymnastics teams, Raisman says USA Gymnastics ignored her repeated complaints about Nassar.
Nassar is also alleged to have pulled down Jacob Moore's pants and exposed his genitalia to a minor female gymnast who was also present.
Moore, who now is a gymnast at the University of MI, joins the more than 260 women and girls who have told law enforcement that they were sexually abused by Nassar.
Gymnastics champion Aly Raisman is suing the U.S. Olympic Committee. "It is my hope that the legal process will hold them accountable and enable the change that is so desperately needed".
Additional reporting from Newsy affiliate CNN. Nassar, who is named as a co-defendant in the lawsuit, is serving decades in prison for molesting some of the sport's top athletes and others as well as child pornography crimes. They didn't alert the Federal Bureau of Investigation for a month or told Michigan State University where Nassar was also practicing at and busing athletes.
Nassar allegedly had freedom to molest the gymnasts under the guise of medical treatments - sometimes with a United States of America gymnastic trainer present.
In her statement cited by NBC, Raisman said the USOC and USA Gymnastics were stonewalling on the question of what they knew about Nassar's behavior.
"You are so sick, I can't even comprehend how angry I feel when I think of you", Raisman said during her sentencing statement.
The suit also claims that while treating Moore, Nassar also exposed the boy's genitalia to a female gymnast present in the room, who was also a minor at that time. Why has the U.S. Olympic Committee been silent?
Days later, the USOC apologized for skipping the hearing, pledged to reach out to the victims, ordered the board of USA Gymnastics to resign, and said it was launching an independent investigation conducted by a third-party. Team USA also failed to contact Michigan State University, Nassar's former employer, for allowing Nassar to continue his abuse. "Why isn't the USOC here right now?" she asked.
The gymnast's attorney, John Manly, said that the USOC and USA Gymnastics were involved in a "conspiracy to silence victims and cover-up the largest child sex abuse scandal in history", according to ABC News.