"In March 2013, a good friend and client in Costa Rica contacted the first author (Shurany) and told him that he had heard some rumors that two of his employees were involved in theft from his company and one of them was a deaf-mute who had been employed at the company for many years, hence the employer did not want to take action against that employee without being sure of his guilt. Additional information indicated that the subject reads lips, knows sign language and can read and write. None of the examiners had any knowledge of sign language, so this option was not available."(...)