Raisman is the second member of the famed "Fierce Five" team of American gymnasts to speak out about Nassar, the former team doctor who has been charged with various counts of sexual misconduct and child pornography.
The former Michigan State doctor, who was sacked by USA Gymnastics in 2015, was previously accused of sexual misconduct by Raisman's fellow Fierce Five member McKayla Maroney and Sydney bronze medalist Jamie Dantzscher. "Why not look at what about the culture?" she said on "60 Minutes".
More than 140 women are suing Nassar and his former employer, Michigan State University.
She said, "Why are we looking at why didn't the girls speak up? I need this, '" Raisman said in an interview with The Associated Press and USA Today in August during the 2017 national championships. He pleaded guilty to child pornography charges but not guilty to charges of sexual assault.
More than 130 women have filed lawsuits against Nassar, saying he sexually abused them as he worked with the US gymnastics team for more than two decades.
Raisman told 60 Minutes in an interview airing Sunday that Dr. Larry Nassar began treating her when she was 15. I can't. every time I look at them, every time I see them smiling, I just think.
"Whether or not he did it to a gymnast, they still knew him". Jamie Dantzscher, a bronze medalist on the 2000 U.S. Olympic team, was part of the initial wave of lawsuits filed against Nassar in 2016.More news: China rolls out the red carpet to Trumps
Raisman said she spoke to FBI investigators after serving as national team captain at the 2016 Games in Rio de Janeiro. "USA Gymnastics is very sorry that any athlete has been harmed..." the statement says, "...we want to work with Aly and all interested athletes to keep athletes safe".
In her tweet, Maroney mentioned a specific instance of sexual abuse when she was 15 years old, in which she alleges Nassar gave her a sleeping pill on a team flight and assaulted her in his hotel room upon landing.
Who else came forward with accusations against Nassar?
"These girls, they should be comfortable going to USA Gymnastics and saying 'I need help, I want therapy".
"Aly's passion and concern for athlete safety is shared by USA Gymnastics", the organization added.
He also faces charges in state court in MI, largely related to allegations that he digitally penetrated women during medical exams for his own sexual gratification.
In June, the gymnastics board adopted the new USA Gymnastics SafeSport Policy that replaced the previous policy.
"In the a year ago, Aly has become an advocate for many issues, and sharing her personal experience of abuse takes great courage", USA Gymnastics said. Raisman and Maroney have both said that Nassar's harassment came in the form of "treatments". The new guidelines require member gyms to go to authorities immediately, with Daniels suggesting USA Gymnastics consider withholding membership from clubs that decline to do so.