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Human Rights: Restrictions on Convention Rights

Police powers of arrest and detention

  • 3 things to know
  • Components 2 and 3

Overview

Two requirements for a lawful arrest without warrant, role of the custody officer and basic time limits on detention without charge.

What you need to know

Answer each one before you reveal it.

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Key term

Give three of the statutory necessity reasons for arrest.

Key term

What are the basic time limits on detention without charge?

Key term

Which Convention Article governs detention, and what does it require?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What are the two requirements for a lawful arrest without warrant?

    Model answer

    The officer must have reasonable grounds to suspect that the person is committing, has committed or is about to commit an offence. The officer must also have reasonable grounds to believe that arrest is necessary for one of the statutory reasons.

  2. 2

    Give three of the statutory necessity reasons for arrest.

    Model answer

    Ascertaining the person's name or address is one. Preventing physical injury, damage to property or an offence against public decency is another. Allowing the prompt and effective investigation of the offence is a third.

  3. 3

    What must be told to a person on arrest?

    Model answer

    The person must be told that they are under arrest and the grounds for the arrest. The information must be given at the time or as soon as practicable afterwards.

  4. 4

    What is the caution, and when must it be given?

    Model answer

    The caution warns a person that they need not say anything, that it may harm their defence not to mention something later relied on in court, and that anything said may be given in evidence. The caution must be given on arrest and before questioning.

  5. 5

    What is the role of the custody officer?

    Model answer

    The custody officer decides whether there is sufficient evidence to charge and authorises detention if there is not. The custody officer must be independent of the investigation and keeps the custody record.

  6. 6

    What are the basic time limits on detention without charge?

    Model answer

    Detention without charge is limited to 24 hours from the relevant time. A superintendent may extend it to 36 hours for an indictable offence, and a magistrates' court may extend it further to a maximum of 96 hours.

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