PACE 1984, At Supervisory Level
The parts of the Police and Criminal Evidence Act 1984 that actually come up in the Evidence and Procedure subject area — not a constable-level refresher, but what a Sergeant needs to know cold.
Detention Time Limits
The standard clock runs 24 hours from the "relevant time" before a superintendent's authority is needed to extend detention to 36 hours. Beyond that, only a magistrates' warrant of further detention can extend it further, up to a 96-hour absolute maximum for indictable offences. As a supervisor, you're the one who typically has to make — or defend — the decision to extend, so understanding exactly what threshold applies at each stage matters more than it did at constable level, where the custody officer usually carried that responsibility.
The Right To Legal Advice, And What Breaching It Actually Risks
Section 58 PACE and Code C set out a suspect's right to legal advice — one of the "significant and substantial" safeguards courts take seriously. Breaching it doesn't automatically make an admission inadmissible, but it gives the defence a strong basis to argue for exclusion under s.78 PACE, where admitting the evidence would adversely affect the fairness of proceedings. Supervisors reviewing an interview strategy need to weigh this risk explicitly, not just tick a procedural box.
Identification Procedures (Code D)
Formal identification procedures exist because badly conducted or suggestive identification is one of the most common causes of wrongful conviction. Code D sets out structured processes (such as VIPER) precisely to protect the reliability of the evidence — for both the witness and the suspect — rather than simply being red tape. A supervisor authorising or reviewing an identification strategy should be able to explain why the structure matters, not just follow it by rote.
General Seizure Powers Beyond A Warrant's Scope
Section 19 PACE gives a general power to seize items found during a lawful search where there are reasonable grounds to believe they're evidence of an offence, or were obtained through one — this isn't limited to items named on a search warrant. Section 32 similarly allows a search of premises where an arrest took place, and s.18 a search of premises the arrested person occupies or controls, generally with an inspector's authority. Knowing where each power's boundary sits is a common promotion-exam test of applied, not just recalled, knowledge.
Test Yourself On This And More
The Evidence and Procedure area is a third of the mock exam bank — PACE, disclosure, hearsay, and interview safeguards, all scored against the real cut score.
Try The Free Sample →Frequently Asked Questions
What is the standard PACE detention limit before a superintendent must authorise an extension?
24 hours from the 'relevant time'. A superintendent can extend to 36 hours; beyond that requires a magistrates' warrant of further detention, up to a 96-hour absolute maximum for indictable offences.
What is a 'special warning' under the Criminal Justice and Public Order Act 1994?
A specific warning (under s.36/s.37) given before questioning a suspect about an object, mark, or their presence at a scene, explaining in ordinary language what's being asked and the consequence of not accounting for it. Getting the warning wrong means no adverse inference can later be drawn from silence.
Why does this matter for the promotion exam specifically?
PACE and its Codes of Practice are the backbone of the Evidence and procedure subject area — supervisors are expected to know not just what the rules are, but why they exist and what breaching them actually risks evidentially, which is what promotion-level questions tend to probe rather than simple recall.
Related
Independent legal explainer, not legal advice — always refer to the current Codes of Practice and your force's own legal services for operational decisions.