Another sign-language interpreter is accused of signing total gibberish. This time it was at the police news conference announcing an arrest in the Tampa serial killings. A woman standing off to the side was supposedly translating every word, but it turns out much of what she was signing was nonsense. The woman, identified as Derlyn Roberts, has a string of arrests for fraud. So how did she come to be "translating" at last week's high-profile police news conference?