Disgraced former USA Gymnastics doctor Larry Nassar, who is currently serving a decades-long sentence in federal prison for sexual abuse, has been delinquent in his payments toward court-ordered criminal penalties, according to a new court filing.Disgraced former USA Gymnastics doctor Larry Nassar, who is currently serving a decades-long sentence in federal prison for sexual abuse, has been delinquent in his payments toward court-ordered criminal penalties, according to a new court filing.