What is investigation is not defined in the Code of Criminal Procedure; but in H.N. Rishbud and Inder Singh v. State of Delhi 1954 Indlaw SC 14 this Court has described, the procedure, for investigation as follows: "Thus, under the Code investigation consists generally of the following steps, (1) Proceeding to the spot, (2) Ascertainment of the facts and circumstances of the case, (3) Discovery and arrest of the suspected offender, (4) Collection of evidence relating to the commission of the offence which may consist of (a) the examination of various persons (including the accused) and the reduction of their statements into writing, if the officer thinks fit, (b) the search of places of seizure of things considered necessary for the investigation and to be produced at the trial, and (5) formation of the opinion as to whether on the material collected there is a case to place the accused before a Magistrate for trial and if so taking the necessary steps for the same by the filing of a charge-sheet u/s