(1) Despite any provisions of this Part, a police officer not below the rank of inspector may make or cause to be made an ex parte application to a magistrate to have the person arrested for any offence specified in subsection (2), detained in police custody for a further period not exceeding 72 hours where the investigation of the offence is incomplete and where the police officer—
(a) has to secure or preserve evidence relating to the offence;
(b) has reasonable grounds to believe that the person arrested will interfere with or tamper with the evidence in respect of the offence or interfere with or cause physical injury to other persons;
(c) has reasonable grounds to believe that the person arrested will alert other persons suspected of having committed or being involved in the commission of the offence who are yet to be arrested;
(d) has reasonable grounds to believe that the person arrested will hinder the recovery of any property obtained as a result of the offence.
(2) The offences to which subsection (1) relates include—
(a) murder, rape, robbery, arson, and any drug-trafficking offence under the Drugs (Prevention of Misuse) Act punishable on indictment by imprisonment of not less than 5 years, any offence under the Firearms Act;
(b) any other indictable offence which the Attorney General may from time to time by notice in the Gazette specify.
(3) Subject to subsection (1), where further detention is authorised the person arrested—
(a) shall be informed of the reason for his or her further detention; and
(b) the reason shall be noted in his or her custody record.