After the judge responded, "You know that I can't do that, thats not how our legal system works", Margraves attacked Nassar and was quickly tackled to the ground by security. When the judge declined, he asked for one minute alone in the room.
After he had been restrained, Mr Margraves asked aloud, "What if this happened to you guys?"
Assistant Attorney General Angela Povilaitis turned to the remaining victims in the court room, telling them they could not behave like this.
As Cunningham continued to explain her denial, Margraves said a phrase that sounded like, "Well I'm gonna have it", before rushing Nassar.More news: Meghan Markle Wore a Bodysuit Under Her Alexander McQueen Tux
After a brief break in the courtroom, Cunningham addressed the court about the violence.
"You know I cannot do that", the judge responded.
"There is no way that this court is going to issue any type of punishment given the circumstances of this case", Cunningham told Margraves after he apologized.
Nassar, the former USA Gymnastics team doctor and Michigan State doctor, is facing his third sentencing for sexual assault and molestation.More news: Akshay Kumar aims to bust period taboo with #PadManChallenge campaign
Nassar was sentenced in January to up to 175 years in prison after more than 150 women and girls came forward and accused the former doctor of sexual abuse spanning some two decades.
Two of Margraves daughters, Madison and Lauren, had just testified about their abuse at the hands of the disgraced doctor when their father lunged for Nassar. He cursed Nassar and called him a "demon" then lunged toward him before law enforcement officers grabbed him. He also is the father of another woman who spoke out against Nassar in neighboring Ingham County last month. I understand this is a remarkable situation.
The tense hearing reportedly resumed after a 25-minute delay.
More than 30 victims have given statements so far. We can not behave like this.More news: Missing woman found on latest season of 'The Bachelor'
"You can not do this. This is not helping your children". In December, a federal judge sentenced Nassar to 60 years in prison on child pornography charges.