A father of three victims tried to attack Larry Nassar in a MI courtroom on Friday after a judge declined his request for a few minutes alone in a locked room with the "demon" former sports doctor.
Court officers tackled Margraves before he got to Nassar but knowing the details of what Nassar did, parents say they can relate to his rage.
Nassar has already been sentenced to up to 175 years in prison for his guilty plea in a neighbouring county to molesting young women under the guise of medical treatment.
Margraves later apologized, saying he had lost control.
Nassar must listen to scores of victims before he's sentenced next week for sexual assault.
The former MI doctor was sentenced 40 to 175 years in prison after being accused of sexual abuse.
"I delivered unintentionally my three daughters to a demon who had his own twisted and sick agenda for his own demented desires", Margraves explained.
"As father of 2 girls, the video made me cry ... that you were stopped before you reached him", supporter Robert Wykoski wrote.
"I feel very remorseful, very apologetic, I was embarrassed", Margraves continued.
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Mr Margraves was blocked by an attorney before court security personnel quickly wrestled him to the ground and held him in contempt of court.
Victims are confronting Nassar in court in Eaton County, Michigan. "I can't imagine that", she said.
"I gotta hear that and I look over here and Larry Nassar is shaking his head 'no, ' like it didn't happen", he said. As the judge denied his request and began to explain how the legal system worked, Randall suddenly lunged toward Nassar.
We'll let you know if criminal charges are filed.
"There is no way this court is going to issue any type of punishment given the circumstances of this case".
Morgan Margraves, 27, spoke on behalf of her sisters at the press conference Friday.
"We all understand this father's action", said actor and pro-wrestler Dwayne "The Rock" Johnson. "Behind bars, he'll soon know what hell means".
Nassar in December was separately sentenced to 60 years in federal prison on child pornography charges.
In a statement cited by NBC News, Liukin said, "The present climate causes me, and more importantly my family, far too much stress, difficulty and uncertainty".