Teenagers are left traumatised, with little recourse to official complaint.
Hopes that new legislation will help change culture of impunity.
"My brother Ali emerged stronger than ever."
Mistreatment continues although some experts say it is no longer systemic.
Recent death in detention highlights routine use of torture against suspects.
Human rights groups act on behalf of frightened victims.
Governor says he’s powerless to stop abuses and extortion by armed men.
Limited success in combating violence in detention as culture of impunity persists.
Former detainee's account of interrogation and torture.