There is mandatory deemed suspension of a government employee when he is arrested and passes 48 hours or more in police custody. Normally in such cases in addition to the criminal case in which the employee is arrested, a departmental proceeding is also started. But if the facts and circumstances of the case and the disciplinary proceeding are same, then the D.A awaits the out come of the result of the criminal case because the suspended employee gets prejudiced in defending the criminal case if he discloses his all cards of defence to the enquiring authority during the departmental proceeding. As the suspension order is mandatory in the case of arrest, the answer to your 2 others queries is covered. In cases of arrest the D.A has no choice but to act in accordance with the law.