Families of Libya's missing lead backlash against militias

A demonstrator holds a poster depicting Firas Ali al-Warfalli, 21, a captive by the February 17 Brigade, during a protest against armed militias in Benghazi September, 22, 2012. REUTERS/Asmaa Waguih

BENGHAZI, Libya (Reuters) - The face of a young man looks out from billboards across Benghazi. "A mother's cry. If my son is guilty, bring him to justice. If he is innocent, let him go," says the caption, which ends with a phone number.

Speaking at the family home, the mother, Ansaf Ibrahim, recounts how dozens of militia fighters from the February 17 Brigade stormed in on August 30 and seized her husband Ali Muftag al-Warfalli and their son Firas, 21, a dentistry student.