Dozens of assault victims are seeking more than $1 billion from the FBI for failing to stop sports doctor Larry Nassar.

The FBI knew in 2015 that Nassar was accused of molesting gymnasts, but they failed to act, allowing him to continue to target young women and girls for more than a year.

"It's time for the FBI to be held accountable for what they've done," said a national champion gymnast.

The agency has six months to reply to the claims. Depending on the FBI, there could be lawsuits. The Justice Department decided not to prosecute former FBI agents who failed to open an investigation.

According to a California law firm, Aly Raisman and McKayla Maroney are all Olympic gold medal winners.

"If the FBI had done its job, Nassar would have been stopped before he ever had the chance to abuse hundreds of girls, including me," said a gymnast.

Three gymnasts said they were sexually abused by Nassar, according to the FBI. The Justice Department's inspector general said that the FBI did not open a formal investigation in Michigan.

The inspector general said that FBI agents in Los Angeles started a sexual tourism investigation against Nassar but didn't alert Michigan authorities.

Michigan State University police arrested Nassar in the fall of 2016 At Michigan State, he was a doctor.

The assault charges against Nassar were handled by the Michigan attorney generals office. He is behind bars.

When a small amount of claims was filed in April, the FBI did not comment.

There were people at the FBI who had a chance to stop this monster and failed. At the Senate hearing, Wray said that it was unacceptable.

More than 300 women and girls who were sexually abused by Nassar will get $500 million from Michigan State University. A $380 million settlement was reached between USA Gymnastics and the U.S. Olympic and Paralympian Committee.

That's right.

Larry Nassar has been accused of sexually abusing young women and girls.