The Crown Prosecution Service (CPS) is a fundamental part of...
Understanding Criminology Unit 3 - AC2.1

The Crown Prosecution Service and Testing Procedures
The CPS was created to address concerns about police bias when they previously had sole authority to decide prosecutions. By separating investigation from prosecution, the CPS ensures decisions are based on evidence and public interest rather than potentially biased police judgments.
The Full Code Test determines whether cases proceed to court through two key components. The Evidential Test examines if there's sufficient evidence for a likely conviction - without adequate evidence, a case cannot proceed regardless of other factors. If this hurdle is cleared, the Public Interest Test considers whether prosecution serves society's interests by evaluating factors like threat level, suspect's age and responsibility, and harm caused.
Real-World Application: The Debbie Purdy case illustrates the public interest assessment in action. Purdy, suffering from multiple sclerosis, sought legal clarification on whether her husband would face prosecution if he helped her travel to Switzerland for euthanasia.
The Damilola Taylor case highlights the critical importance of the evidential test. This tragic murder of a 10-year-old boy resulted in a 6-year legal battle spanning three trials due to poor evidence handling and an unreliable witness. The CPS reputation suffered significantly when it became clear that obvious signs of deception in witness testimony weren't properly scrutinised.

Special Circumstances and Threshold Testing
In exceptional situations, the Threshold Test may be applied when rapid charging decisions are needed despite incomplete evidence. This typically occurs with major drug organisations or when a suspect poses serious public risk. Unlike the Full Code Test, this can employ reasonable suspicion rather than concrete evidence.
The Threshold Test is also valuable when concerns exist about bail risks or when investigators expect more evidence to emerge during trial proceedings. In these cases, police and CPS typically collaborate closely to manage the ongoing investigation while legal proceedings advance.
Important Consideration: The Threshold Test aims to balance public safety with fair process when immediate action is necessary but evidence collection is incomplete.
The case of Abu Hamza al-Masri demonstrates potential consequences of delay in prosecution. Despite his extremist views, building a case against him took significant time due to free speech protections, complex intelligence gathering requirements, and exploitation of legal loopholes. Had the Threshold Test been employed earlier, his prosecution might have occurred sooner despite initially failing the Full Code Test, even though prosecution was clearly in the public interest.
We thought you’d never ask...
Similar content
Most popular content: Criminology
9Criminology: Crime & Punishment Overview
Comprehensive mindmaps covering key concepts in the Crime and Punishment topic for WJEC Criminology Unit 4. This resource includes detailed insights into the Criminal Justice System, crime prevention strategies, sentencing models, and the roles of various agencies. Ideal for A-Level revision, ensuring you grasp essential theories and legislative processes to excel in your exams.
Forensic Psychology Overview
Comprehensive revision notes covering key concepts in forensic psychology for AQA A Level Psychology. Explore topics such as offender profiling, criminal personality, behavioral approaches, and the impact of socialization on criminal behavior. Ideal for students preparing for exams and seeking a deeper understanding of the psychological aspects of crime and punishment.
Evaluating Criminal Investigation Roles
This study note evaluates the effectiveness of various personnel involved in criminal investigations, including the National Crime Agency, HM Revenue and Customs, Crime Scene Investigators, and the Crown Prosecution Service. It discusses their strengths, weaknesses, and real-world case studies, providing insights into their impact on the criminal justice system. Ideal for criminology students and those studying law enforcement roles.
Evaluating Criminal Investigation Roles
This study note provides a comprehensive evaluation of the effectiveness of various personnel involved in criminal investigations, including Crime Scene Investigators, Forensic Scientists, Pathologists, and the Crown Prosecution Service. It covers their roles, strengths, limitations, and the impact of their work on the criminal justice system. Ideal for criminology students and those studying law enforcement principles.
Roles in Criminal Investigations
Explore the critical roles of personnel in criminal investigations, including SOCOs, police officers, forensic scientists, CPS, pathologists, and the NCA. This summary highlights their responsibilities, strengths, and limitations, providing insights into the effectiveness of each role in the justice system. Ideal for students studying law enforcement and forensic science.
Criminal Justice Overview
Explore key concepts in criminal justice, including the trial process, roles of court personnel, types of offenses, and evidence handling. This comprehensive summary covers essential topics such as jury strengths and weaknesses, the role of the CPS, and the impact of media on trials. Ideal for students preparing for assessments in criminology. Achieved a B grade.
Comprehensive Crime Theories Overview
Explore a detailed overview of crime and deviance theories for AQA A-Level Sociology. This resource covers key concepts including biological theories, labelling theory, globalisation impacts, victimology, and the role of media in crime. Ideal for revision, it provides insights into social control, punishment, and the intersection of crime with gender and ethnicity.
Criminology Unit 3 - AC:1.1 Example
These are my Criminology Unit 3 1.1 notes, please utilise these as a guidance for your exam. Ensure you do not use this as your own work as you will be disqualified for plagiarism. Good luck studying! .
Criminal Justice Evidence Rules
Explore the essential rules governing the use of evidence in criminal cases, including reliability, admissibility, and relevance. This summary covers key concepts such as the roles of personnel in investigations, the impact of witness testimonies, and the implications of plea bargaining. Ideal for Year 13 criminology students preparing for assessments.
Most popular content in Criminology
9Criminology: Crime & Punishment Overview
Comprehensive mindmaps covering key concepts in the Crime and Punishment topic for WJEC Criminology Unit 4. This resource includes detailed insights into the Criminal Justice System, crime prevention strategies, sentencing models, and the roles of various agencies. Ideal for A-Level revision, ensuring you grasp essential theories and legislative processes to excel in your exams.
WJEC Unit 4 Criminology
Criminology unit 4 detailed revision note
Criminology Unit 4 Revision Cards
These were the revision cards I used for my Criminology Unit 4 exam. Feel free to print these out and use them as an exam resource, they have been colour coded for each AC. Good luck!
Evaluating Criminal Investigation Roles
This study note evaluates the effectiveness of various personnel involved in criminal investigations, including the National Crime Agency, HM Revenue and Customs, Crime Scene Investigators, and the Crown Prosecution Service. It discusses their strengths, weaknesses, and real-world case studies, providing insights into their impact on the criminal justice system. Ideal for criminology students and those studying law enforcement roles.
Evaluating Criminal Investigation Roles
This study note provides a comprehensive evaluation of the effectiveness of various personnel involved in criminal investigations, including Crime Scene Investigators, Forensic Scientists, Pathologists, and the Crown Prosecution Service. It covers their roles, strengths, limitations, and the impact of their work on the criminal justice system. Ideal for criminology students and those studying law enforcement principles.
Roles in Criminal Investigations
Explore the critical roles of personnel in criminal investigations, including SOCOs, police officers, forensic scientists, CPS, pathologists, and the NCA. This summary highlights their responsibilities, strengths, and limitations, providing insights into the effectiveness of each role in the justice system. Ideal for students studying law enforcement and forensic science.
Criminal Justice Overview
Explore key concepts in criminal justice, including the trial process, roles of court personnel, types of offenses, and evidence handling. This comprehensive summary covers essential topics such as jury strengths and weaknesses, the role of the CPS, and the impact of media on trials. Ideal for students preparing for assessments in criminology. Achieved a B grade.
Criminology Unit 3 - AC:1.1 Example
These are my Criminology Unit 3 1.1 notes, please utilise these as a guidance for your exam. Ensure you do not use this as your own work as you will be disqualified for plagiarism. Good luck studying! .
Criminal Justice Evidence Rules
Explore the essential rules governing the use of evidence in criminal cases, including reliability, admissibility, and relevance. This summary covers key concepts such as the roles of personnel in investigations, the impact of witness testimonies, and the implications of plea bargaining. Ideal for Year 13 criminology students preparing for assessments.
Most popular content
9Comprehensive Crime & Deviance Overview
Explore an extensive revision of crime and deviance topics, including theories, types of crime, and the impact of media. This resource covers key concepts such as Marxism, functionalism, gender and crime, and the influence of globalization on criminal behavior. Ideal for students seeking a thorough understanding of criminology and its various theories. Type: Full Topic Revision.
Sociology of Families: Comprehensive Revision
Dive into an extensive overview of family dynamics, perspectives, and patterns in sociology. This resource covers key concepts such as family diversity, gender roles, marriage, and the impact of social policies on family structures. Perfect for A-Level Sociology students preparing for Paper 2.
Criminology: Crime & Punishment Overview
Comprehensive mindmaps covering key concepts in the Crime and Punishment topic for WJEC Criminology Unit 4. This resource includes detailed insights into the Criminal Justice System, crime prevention strategies, sentencing models, and the roles of various agencies. Ideal for A-Level revision, ensuring you grasp essential theories and legislative processes to excel in your exams.
Cell Biology and Cell structure
cell structures
WJEC Unit 4 Criminology
Criminology unit 4 detailed revision note
Media Studies: Key Concepts & Theories
Dive into the essential concepts and theories of media studies for AQA A-level Sociology. This comprehensive revision guide covers topics such as media influence, representations, globalization, and sociological perspectives, ensuring you grasp the critical elements needed for your exams. Perfect for students seeking to enhance their understanding of media's role in society.
1.cells Gcse biology question cards
combined science higher biology
GCSE Physics - Energy stores and Systems
Pl-Energy topic to revise for GCSE
Sociology of Education Overview
Explore comprehensive A-Level Sociology notes on the education system, covering key theories, policies, and sociological perspectives. This resource includes insights on marketisation, gender roles, cultural deprivation, and educational inequalities, providing a thorough understanding of how education shapes social stratification and individual achievement. Ideal for exam preparation and in-depth study.
Students love us — and so will you.
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Understanding Criminology Unit 3 - AC2.1
The Crown Prosecution Service (CPS) is a fundamental part of the British legal system responsible for prosecuting criminal cases in England and Wales. Established in 1985, it creates an essential separation between police investigations and prosecution decisions, ensuring fairer outcomes...

The Crown Prosecution Service and Testing Procedures
The CPS was created to address concerns about police bias when they previously had sole authority to decide prosecutions. By separating investigation from prosecution, the CPS ensures decisions are based on evidence and public interest rather than potentially biased police judgments.
The Full Code Test determines whether cases proceed to court through two key components. The Evidential Test examines if there's sufficient evidence for a likely conviction - without adequate evidence, a case cannot proceed regardless of other factors. If this hurdle is cleared, the Public Interest Test considers whether prosecution serves society's interests by evaluating factors like threat level, suspect's age and responsibility, and harm caused.
Real-World Application: The Debbie Purdy case illustrates the public interest assessment in action. Purdy, suffering from multiple sclerosis, sought legal clarification on whether her husband would face prosecution if he helped her travel to Switzerland for euthanasia.
The Damilola Taylor case highlights the critical importance of the evidential test. This tragic murder of a 10-year-old boy resulted in a 6-year legal battle spanning three trials due to poor evidence handling and an unreliable witness. The CPS reputation suffered significantly when it became clear that obvious signs of deception in witness testimony weren't properly scrutinised.

Special Circumstances and Threshold Testing
In exceptional situations, the Threshold Test may be applied when rapid charging decisions are needed despite incomplete evidence. This typically occurs with major drug organisations or when a suspect poses serious public risk. Unlike the Full Code Test, this can employ reasonable suspicion rather than concrete evidence.
The Threshold Test is also valuable when concerns exist about bail risks or when investigators expect more evidence to emerge during trial proceedings. In these cases, police and CPS typically collaborate closely to manage the ongoing investigation while legal proceedings advance.
Important Consideration: The Threshold Test aims to balance public safety with fair process when immediate action is necessary but evidence collection is incomplete.
The case of Abu Hamza al-Masri demonstrates potential consequences of delay in prosecution. Despite his extremist views, building a case against him took significant time due to free speech protections, complex intelligence gathering requirements, and exploitation of legal loopholes. Had the Threshold Test been employed earlier, his prosecution might have occurred sooner despite initially failing the Full Code Test, even though prosecution was clearly in the public interest.
We thought you’d never ask...
Similar content
Most popular content: Criminology
9Criminology: Crime & Punishment Overview
Comprehensive mindmaps covering key concepts in the Crime and Punishment topic for WJEC Criminology Unit 4. This resource includes detailed insights into the Criminal Justice System, crime prevention strategies, sentencing models, and the roles of various agencies. Ideal for A-Level revision, ensuring you grasp essential theories and legislative processes to excel in your exams.
Forensic Psychology Overview
Comprehensive revision notes covering key concepts in forensic psychology for AQA A Level Psychology. Explore topics such as offender profiling, criminal personality, behavioral approaches, and the impact of socialization on criminal behavior. Ideal for students preparing for exams and seeking a deeper understanding of the psychological aspects of crime and punishment.
Evaluating Criminal Investigation Roles
This study note evaluates the effectiveness of various personnel involved in criminal investigations, including the National Crime Agency, HM Revenue and Customs, Crime Scene Investigators, and the Crown Prosecution Service. It discusses their strengths, weaknesses, and real-world case studies, providing insights into their impact on the criminal justice system. Ideal for criminology students and those studying law enforcement roles.
Evaluating Criminal Investigation Roles
This study note provides a comprehensive evaluation of the effectiveness of various personnel involved in criminal investigations, including Crime Scene Investigators, Forensic Scientists, Pathologists, and the Crown Prosecution Service. It covers their roles, strengths, limitations, and the impact of their work on the criminal justice system. Ideal for criminology students and those studying law enforcement principles.
Roles in Criminal Investigations
Explore the critical roles of personnel in criminal investigations, including SOCOs, police officers, forensic scientists, CPS, pathologists, and the NCA. This summary highlights their responsibilities, strengths, and limitations, providing insights into the effectiveness of each role in the justice system. Ideal for students studying law enforcement and forensic science.
Criminal Justice Overview
Explore key concepts in criminal justice, including the trial process, roles of court personnel, types of offenses, and evidence handling. This comprehensive summary covers essential topics such as jury strengths and weaknesses, the role of the CPS, and the impact of media on trials. Ideal for students preparing for assessments in criminology. Achieved a B grade.
Comprehensive Crime Theories Overview
Explore a detailed overview of crime and deviance theories for AQA A-Level Sociology. This resource covers key concepts including biological theories, labelling theory, globalisation impacts, victimology, and the role of media in crime. Ideal for revision, it provides insights into social control, punishment, and the intersection of crime with gender and ethnicity.
Criminology Unit 3 - AC:1.1 Example
These are my Criminology Unit 3 1.1 notes, please utilise these as a guidance for your exam. Ensure you do not use this as your own work as you will be disqualified for plagiarism. Good luck studying! .
Criminal Justice Evidence Rules
Explore the essential rules governing the use of evidence in criminal cases, including reliability, admissibility, and relevance. This summary covers key concepts such as the roles of personnel in investigations, the impact of witness testimonies, and the implications of plea bargaining. Ideal for Year 13 criminology students preparing for assessments.
Most popular content in Criminology
9Criminology: Crime & Punishment Overview
Comprehensive mindmaps covering key concepts in the Crime and Punishment topic for WJEC Criminology Unit 4. This resource includes detailed insights into the Criminal Justice System, crime prevention strategies, sentencing models, and the roles of various agencies. Ideal for A-Level revision, ensuring you grasp essential theories and legislative processes to excel in your exams.
WJEC Unit 4 Criminology
Criminology unit 4 detailed revision note
Criminology Unit 4 Revision Cards
These were the revision cards I used for my Criminology Unit 4 exam. Feel free to print these out and use them as an exam resource, they have been colour coded for each AC. Good luck!
Evaluating Criminal Investigation Roles
This study note evaluates the effectiveness of various personnel involved in criminal investigations, including the National Crime Agency, HM Revenue and Customs, Crime Scene Investigators, and the Crown Prosecution Service. It discusses their strengths, weaknesses, and real-world case studies, providing insights into their impact on the criminal justice system. Ideal for criminology students and those studying law enforcement roles.
Evaluating Criminal Investigation Roles
This study note provides a comprehensive evaluation of the effectiveness of various personnel involved in criminal investigations, including Crime Scene Investigators, Forensic Scientists, Pathologists, and the Crown Prosecution Service. It covers their roles, strengths, limitations, and the impact of their work on the criminal justice system. Ideal for criminology students and those studying law enforcement principles.
Roles in Criminal Investigations
Explore the critical roles of personnel in criminal investigations, including SOCOs, police officers, forensic scientists, CPS, pathologists, and the NCA. This summary highlights their responsibilities, strengths, and limitations, providing insights into the effectiveness of each role in the justice system. Ideal for students studying law enforcement and forensic science.
Criminal Justice Overview
Explore key concepts in criminal justice, including the trial process, roles of court personnel, types of offenses, and evidence handling. This comprehensive summary covers essential topics such as jury strengths and weaknesses, the role of the CPS, and the impact of media on trials. Ideal for students preparing for assessments in criminology. Achieved a B grade.
Criminology Unit 3 - AC:1.1 Example
These are my Criminology Unit 3 1.1 notes, please utilise these as a guidance for your exam. Ensure you do not use this as your own work as you will be disqualified for plagiarism. Good luck studying! .
Criminal Justice Evidence Rules
Explore the essential rules governing the use of evidence in criminal cases, including reliability, admissibility, and relevance. This summary covers key concepts such as the roles of personnel in investigations, the impact of witness testimonies, and the implications of plea bargaining. Ideal for Year 13 criminology students preparing for assessments.
Most popular content
9Comprehensive Crime & Deviance Overview
Explore an extensive revision of crime and deviance topics, including theories, types of crime, and the impact of media. This resource covers key concepts such as Marxism, functionalism, gender and crime, and the influence of globalization on criminal behavior. Ideal for students seeking a thorough understanding of criminology and its various theories. Type: Full Topic Revision.
Sociology of Families: Comprehensive Revision
Dive into an extensive overview of family dynamics, perspectives, and patterns in sociology. This resource covers key concepts such as family diversity, gender roles, marriage, and the impact of social policies on family structures. Perfect for A-Level Sociology students preparing for Paper 2.
Criminology: Crime & Punishment Overview
Comprehensive mindmaps covering key concepts in the Crime and Punishment topic for WJEC Criminology Unit 4. This resource includes detailed insights into the Criminal Justice System, crime prevention strategies, sentencing models, and the roles of various agencies. Ideal for A-Level revision, ensuring you grasp essential theories and legislative processes to excel in your exams.
Cell Biology and Cell structure
cell structures
WJEC Unit 4 Criminology
Criminology unit 4 detailed revision note
Media Studies: Key Concepts & Theories
Dive into the essential concepts and theories of media studies for AQA A-level Sociology. This comprehensive revision guide covers topics such as media influence, representations, globalization, and sociological perspectives, ensuring you grasp the critical elements needed for your exams. Perfect for students seeking to enhance their understanding of media's role in society.
1.cells Gcse biology question cards
combined science higher biology
GCSE Physics - Energy stores and Systems
Pl-Energy topic to revise for GCSE
Sociology of Education Overview
Explore comprehensive A-Level Sociology notes on the education system, covering key theories, policies, and sociological perspectives. This resource includes insights on marketisation, gender roles, cultural deprivation, and educational inequalities, providing a thorough understanding of how education shapes social stratification and individual achievement. Ideal for exam preparation and in-depth study.
Students love us — and so will you.
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.