. >> reporter: part of the mystery of how this happened is solved and how close the northern virginia couple got to president obama. tonight the secret service is looking into whether there should be criminal charges. this is the official white house photo showing tareq and michaele salahi in a receiving line shaking hands with president barack obama. the newest revelation in what's now a growing scandal. tuesday night the pair is accused of slipping into a white house state dinner uninvited despite the supposed high security. not only was the president there, but india's prime minister too. now the secret service wants to question the couple. one newspaper says two agents showed up at their oasis winery about 11:00 friday morning. a vineyard manager tolded agent the salahis weren't there. then she says the agents left this message for them. >> they said -- [ inaudible ] and that if they didn't -- [ inaudible ] >> reporter: the revelation has left many asking how could the security breach happen. the agency charged with protecting the president says its own protocols violated at an in