Investigation procedure requires police to report suspected offences to Magistrate and secure forensic and victim-recording measures. Section 176 requires the officer in charge to report suspected offences to a Magistrate and to proceed personally or depute a prescribed subordinate to investigate, discover and arrest offenders. Exceptions allow omission of on site action in named non serious cases or where no sufficient ground exists, subject to recorded reasons, fortnightly diary filing and informant notification. Victim statements in rape cases are to be recorded at the victim's chosen place, preferably by a woman officer and may be audio video recorded. For serious offences, a forensic expert must collect evidence and videograph the process, with interstate facility use where necessary.