after being convicted of molesting hundreds of young women, former USA Gymnastics doctor Larry Nassar has been transferred to a high security federal prison in Tucson. Nassar is at the United States Penitentiary, Tucson. it holds about 1,390 male inmates. Nassar was sentenced on Monday to 40 to 125 years in prison. He had already received a 40-to-175-year sentence in a neighboring county. he was sentenced to a 60-year federal term for child pornography convictions.