This discussion explores the complex legalities surrounding the use of evidence from one charged officer against another within joint disciplinary proceedings. The scenario involves nine officers facing charges, with one principal officer accused of taking money in a job racket. The core question is whether testimony from one charged officer can be legally used as evidence against a co-accused, and if specific case law supports this practice. Additionally, the legality of the Enquiry Officer initiating common proceedings without explicit disciplinary authority approval is questioned, especially given the officers' different postings and individual proceeding numbers.