June 8, 2009 12:20 pm Prostitution Ring Could Be Case of Human Trafficking A prostitution sting in Vista leads to the arrest of 22 women and 2 men, but now investigators are looking into whether this could also be a case of human trafficking. US & World Videos 2:41 San Diego lifeguards describe fighting Oceanside Pier fire 2:32 Students and staff confused after the University of Saint Katherine closes abruptly 2:58 NASA researchers aim to enhance safety, flight operations in wildland firefighting 2:47 San Diego welding students recreate replica of historic Black Family Statues 4:29 Escondido woman warned husband may be a killer: Dateline