Four men have been charged in a federal sex trafficking case in Danbury after FBI agents uncovered a WhatsApp ad offering two minors for sex. A March raid led to the discovery of a 15- and 16-year-old girl locked in separate bedrooms. Investigators say one suspect arranged more than 20 appointments with men over a two-day period. The men charged are 39 year old Oswaldo Ordonez-Ortega of Danbury; 40 year old Marco Robles of Brookfield; 40 year old Edwin Quilli-Tacuri of Danbury; and 23 year old Bryan Ismael Vasquez-Salinas of Danbury. 3 of the men are Ecuadorian citizens, All face at least 10 years in prison if convicted.