Los Angeles County sheriff's detectives have launched a probe into what appears to be a secret deputy clique within the department's elite gang unit, an investigation triggered by the discovery of a document suggesting the group embraces shootings as a badge of honor. The document described a code of conduct for the Jump Out Boys, a clique of hard-charging, aggressive deputies who gain more respect after being involved in a shooting, according to sources with knowledge of the investigation. The pamphlet is relatively short, sources said, and explains that deputies earn admission into the group through the endorsement of members....