An investigation over the period of nine months found that "predatory coaches were allowed to move from gym to gym, undetected by a lax system of oversight, or dangerously passed on by USA Gymnastics-certified gyms".
Don Peters, the national coach for the 1984 Olympic team, was banned from USAG in 2011, after two former gymnasts accused him of sexual abuse.
In 2016, Olympic team doctor Larry Nassar was arrested on charges of sex abuse and possession of child pornography.
In 1992, Robert Dean Head, a USAG coach in Kentucky, pled guilty to raping a 12-year old.
In 2007, USAG made background checks mandatory for all coaches.
Bell plead guilty and is serving eight years in prison.