MASON, Mich. -- A former USA Gymnastics team doctor has pleaded not guilty to charges of first-degree criminal sexual conduct in Michigan involving a girl under 13.
Three charges were filed Monday against Dr. Larry Nassar of Holt, Michigan, according to online court records in Ingham County. The alleged incidents occurred in 1998 and 2005, and Attorney General Bill Schuette said the girl wasn't a gymnast, patient or family member.
Nassar, 53, was arrested Monday while running an errand. He was arraigned Tuesday by video from county jail. He was released after 10 percent of a $1 million bond was paid.
The alleged assaults occurred between 1998 and 2005.
Schuette said Nassar committed "predatory, menacing" acts and "stole this young lady's childhood. ... This is just the tip of the iceberg."
University police chief James Dunlap said his department has received roughly 50 complaints.
"We're dealing with decades of effort to go back and identify witnesses and to compile those for submission to the attorney general's office," Dunlap said.
Nassar has been under scrutiny this year after two gymnasts, including a member of the 2000 U.S. women's Olympic team, accused him of sexual abuse. A lawsuit by one is pending in California.
A Los Angeles woman filed a civil lawsuit against Nassar on Tuesday, in Ingham County. Attorney Brian McKeen said his client was sexually assaulted in 1996 and 1997 during treatments for lower back pain when she was a 14-year-old gymnast in East Lansing.
Blumer ordered Nassar to wear an electronic tether and to surrender his passport. He also was prohibited from being present with anyone under 18, including his children, unless another adult is there.
A preliminary exam was scheduled for Dec. 15.
Nassar, who could face life imprisonment if he is convicted, has denied wrongdoing. He was on the faculty at Michigan State University but was fired in September for not complying with "employment requirements'' put in place after a 2014 investigation of alleged misconduct. MSU didn't elaborate.
Indianapolis-based USA Gymnastics, which has been named in two civil lawsuits, said previously that that it cut ties with Nassar after learning of athlete concerns about him in the summer of 2015.
"USA Gymnastics today learned about the charges against Dr. Larry Nassar through a media report,'' it said. "As we previously have made clear, when USA Gymnastics first learned of athlete concerns regarding Dr. Nassar, those concerns were reported to the FBI and Nassar was dismissed from further involvement with USA Gymnastics.''
Schuette said MSU asked his office to review allegations against Nassar, who taught at the school and worked in its sports medicine clinic.
Nassar recently finished last in a three-candidate race for two seats on the Holt, Michigan, school board.
The Associated Press contributed to this report.