The latest US report shows that more than 1 in 10 juvenile offenders are molested or raped.  Around 85 percent of these occurences are at the hands of a staff member, rather than another inmate.  Surprisingly, 95 percent of all youth reporting staff sexual misconduct said they had been victimized by a female. 

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Alternet: Shocking Report Reveals Epidemic of Sexual Abuse in Juvenile Prisons