Criminology · Year 13 · From Crime Scene to Courtroom · 1.º Período

Processing Evidence and Suspect Rights

An overview of the rules of evidence collection, chain of custody, and the rights of suspects under the Police and Criminal Evidence Act (PACE) 1984.

TL;DR:This topic covers the critical transition of evidence from the crime scene to the laboratory and eventually the courtroom. It focuses on the 'chain of custody' and the statutory protections afforded to suspects under the Police and Criminal Evidence Act (PACE) 1984. For Year 13 students, this is a lesson in procedural justice: how the law ensures that evidence is not only scientifically valid but also legally admissible.

• National Curriculum Attainment Targets
• WJEC Level 3 AC 1.3 Explain how evidence is processed
• WJEC Level 3 AC 1.4 Examine the rights of individuals in criminal investigations

About This Topic

This topic covers the critical transition of evidence from the crime scene to the laboratory and eventually the courtroom. It focuses on the 'chain of custody' and the statutory protections afforded to suspects under the Police and Criminal Evidence Act (PACE) 1984. For Year 13 students, this is a lesson in procedural justice: how the law ensures that evidence is not only scientifically valid but also legally admissible.

Students will examine the rights of individuals during detention, including the right to legal advice and the limits on how long a suspect can be held without charge. The curriculum emphasizes that a breach in PACE or a gap in the chain of custody can lead to evidence being excluded under Section 78 of PACE, potentially collapsing a trial. This connection between police conduct and judicial outcomes is central to the WJEC specification.

This topic comes alive when students can physically model the patterns of evidence handling and the timeline of suspect detention through collaborative mapping.

Key Questions

1. Why is the chain of custody crucial in a criminal investigation?
2. What protections does PACE 1984 offer to suspects in custody?
3. How can improper evidence handling affect the outcome of a trial?

Watch Out for These Misconceptions

Common Misconception

The police can hold a suspect indefinitely if the crime is serious enough.

What to Teach Instead

PACE sets strict limits: 24 hours normally, up to 36 with a Superintendent's permission, and up to 96 hours with a Magistrate's warrant. Using a simulation of the 'PACE clock' helps students internalize these legal thresholds.

Common Misconception

Evidence is only 'bad' if it is scientifically incorrect.

What to Teach Instead

Evidence can be scientifically perfect but legally 'inadmissible' if the chain of custody is broken or if it was obtained via a breach of rights. Collaborative mapping of the evidence journey highlights these procedural vulnerabilities.

Active Learning Ideas

Inquiry Circle

The Evidence Log

Provide a box of 'evidence' items and a set of log sheets. Students must work together to document each item's journey, ensuring every hand-off is recorded, and identify where a 'break' in the chain might occur.

40 min·Small Groups

Simulation Game

The PACE Clock

Give groups a scenario of a suspect arrested for a serious crime. They must manage the 'PACE clock,' deciding when to apply for extensions from a Superintendent or a Magistrate while ensuring the suspect's rights are met.

30 min·Small Groups

Think-Pair-Share

Admissibility Scenarios

Present short scenarios where police obtain evidence through questionable means, such as an unrecorded interview. Pairs must decide if the evidence should be excluded under Section 78 of PACE and explain why.

25 min·Pairs

Frequently Asked Questions

What is the 'chain of custody' in simple terms?

It is the chronological paper trail that records the sequence of custody, control, transfer, and analysis of physical or electronic evidence. It proves that the evidence presented in court is exactly the same as what was collected at the scene.

What happens if the police breach PACE 1984?

If PACE is breached, the evidence obtained may be deemed 'inadmissible' in court. Under Section 78, a judge can refuse to allow evidence if its admission would have an adverse effect on the fairness of the proceedings.

What are the key rights of a suspect at a police station?

The three main rights are: the right to have someone informed of their arrest, the right to consult a solicitor privately and receive free legal advice, and the right to consult the PACE Codes of Practice.

How can active learning help students understand suspect rights?

By using simulations where students must act as a 'Custody Officer,' they have to actively apply PACE rules under pressure. This move from passive reading to active application helps them remember specific time limits and legal requirements, making the complexities of the Act much more accessible.