“In a 2013 survey (USA) of more than 8,700 juveniles housed in 326 facilities across the country, 8 percent said they experienced sex abuse at the hands of the staff supervising them. Twenty percent of those who said they were victimized by staff said it happened on more than 10 occasions. But perhaps the most surprising finding: Nine out of 10 victims were males abused by female staffers” (linked above).
For more on sexual abuse in prisons around the world, read Teen Activist Speaks Out Against Rape in Syrian Prisons. *Trigger Warning*