Understanding the Pillars of the Criminal Justice System

When a crime occurs, justice does not happen automatically. A structured network of institutions swings into action – recording complaints, investigating facts, conducting trials, and ultimately deciding what happens to the accused. This network is what we call the criminal justice system (CJS). In India, this system has four core components: the legislature, the police, the judiciary, and correctional institutions. Each plays a distinct role, yet none operates in isolation. Understanding how these pillars function – and how they depend on each other – is fundamental to understanding how justice actually works in practice.

The legislative foundation: where justice begins 🔗

Before a police officer can make an arrest or a court can convict an offender, Parliament must define what constitutes a crime and how it should be handled. This is the role of the legislature – the first and foundational component of the criminal justice system.

India’s criminal law has historically rested on three colonial-era statutes: the Indian Penal Code (IPC) of 1860, which defined crimes and punishments; the Code of Criminal Procedure (CrPC) of 1973, which laid down investigative and trial processes; and the Indian Evidence Act of 1872, which governed how facts are proved in court. In a landmark overhaul, Parliament replaced all three in 2023. The Bharatiya Nagarik Suraksha Sanhita (BNSS), 2023 replaced the CrPC, while the Bharatiya Nyaya Sanhita (BNS) replaced the IPC and the Bharatiya Sakshya Adhiniyam replaced the Evidence Act. These three new laws came into effect in July 2024.

The BNSS is particularly significant from a structural standpoint. It governs everything from investigation and arrest to trial, sentencing, and appeal, and mandates forensic investigation for serious offences punishable with seven or more years of imprisonment. It also introduced e-FIRs, time-bound disposal of bail applications, and digital service of summons – reshaping how every other component of the system functions.

Under Article 246 of the Constitution, police, public order, courts, and prisons are placed in the State List, meaning states have primary responsibility over these institutions. However, the substantive criminal laws enacted by Parliament are binding on all states, creating a unified legal framework within which state-level institutions operate.

The police: the first point of contact 🔗

The police are the entry point of the criminal justice system. They are the first agency to receive information about a crime, and everything that follows – prosecution, trial, punishment – depends heavily on the quality of their work.

Functions and powers 🔗

The primary responsibilities of the police include maintaining law and order, preventing and detecting crimes, and investigating offences. Under the BNSS (previously under the CrPC), the police have the power to arrest without a warrant in cognisable offences – those serious enough that immediate action is warranted. For non-cognisable offences, a magistrate’s warrant is required before an arrest can be made.

Under Section 161 of the BNSS (formerly the CrPC), the investigating officer has the authority to examine any person who may have knowledge of the facts and record their statement. The police also conduct searches, seize evidence, prepare a charge sheet, and present it before the magistrate. This charge sheet is the formal document that transfers the matter from investigation to prosecution.

Structure of the police force 🔗

India’s police force is organised hierarchically. At the district level, the Superintendent of Police (SP) oversees operations, with Deputy Superintendent of Police (DSP) and Assistant Superintendent of Police (ASP) below them. The police station, headed by the Station House Officer (SHO), is the basic unit of police administration where all crimes must be recorded. Above the district level are the Inspector General (IG), Deputy Inspector General (DIG), and Additional Director General (Addl. DGP), up to the Director General of Police (DGP) at the state apex.

Alongside the state police, central agencies like the Central Bureau of Investigation (CBI) and specialised wings like the Crime Investigation Department (CID) investigate complex or sensitive cases that require greater resources or neutrality.

Challenges facing the police 🔗

Despite its critical role, the police force faces significant structural problems. Instances of custodial abuse, political interference, lack of female officers, and inadequate infrastructure continue to undermine public trust. Accountability mechanisms remain weak, and the force is often understaffed relative to India’s population.

The prosecution: bridging investigation and adjudication 🔗

Once the police file a charge sheet, the case moves to the prosecution – a component that often receives less attention but is equally critical. The Public Prosecutor (PP) represents the state in criminal trials. Their job is not merely to secure a conviction, but to place all relevant facts before the court so that justice can be done.

The prosecution scrutinises the charge sheet prepared by the police and then presents evidence before the court to establish the guilt of the accused. Importantly, the Supreme Court has held that a Public Prosecutor may even withdraw from prosecution if the evidence is insufficient – their duty is to justice, not conviction at any cost.

The prosecution is linked closely to both the police and the judiciary. If the investigation is shoddy or evidence is tampered with, even a capable prosecutor will struggle to establish guilt. At the same time, the prosecutor must work within the procedural boundaries that the judiciary enforces.

The judiciary: the arbiter of justice 🔗

The judiciary is the component that most people associate with justice – and rightly so. Courts administer justice through legal proceedings, determine guilt based on evidence, and impose sentences after considering factors like the severity of the offence, the offender’s background, and the possibility of rehabilitation.

Structure of the criminal courts 🔗

India has a tiered court structure for criminal matters. At the base are the Magistrate Courts – Judicial Magistrates and Executive Magistrates – that handle the majority of criminal cases. Above them are the Sessions Courts at the district level, which try the most serious offences including murder and robbery. Each state has a High Court that hears appeals from the Sessions Court and exercises supervisory jurisdiction over all subordinate courts within the state. At the apex sits the Supreme Court of India, which is the final court of appeal in both civil and criminal matters.

Under the adversarial system that India follows – inherited from British common law – the judge acts as a neutral umpire and fact-finder, while the prosecution and defence argue their respective cases. The judge does not investigate – that is the police’s job. The judge evaluates the evidence placed before the court and determines whether guilt has been proved beyond reasonable doubt.

Challenges in the judiciary 🔗

The most pressing problem facing Indian courts is the sheer volume of pending cases. As of July 2023, over five crore cases were pending across all courts – 87.4% in subordinate courts, 12.4% in High Courts, with nearly 1.82 lakh cases pending for over 30 years. India has only 21 judges per million people against a long-standing target of 50, creating a structural bottleneck that delays justice for everyone involved.

Fast-track courts were established to address this backlog, but their functioning has been far from satisfactory – existing courts are typically designated as fast-track courts without additional judges or dedicated infrastructure, which means existing caseloads simply pile up further.

Correctional institutions: the final stage 🔗

Once the court delivers a verdict of guilty and imposes a sentence, the convicted person enters the correctional system. This includes prisons, remand homes, borstal institutions for juvenile offenders, probation services, and parole oversight.

The philosophy underlying correctional institutions has shifted significantly over the decades. The older view treated imprisonment purely as punishment. Modern correctional philosophy focuses on rehabilitating offenders through education, vocational training, yoga, and meditation, with the goal of reintegrating them into society as productive members. In this sense, prisons are no longer simply custodial facilities – they are, in theory, places of reform.

The BNSS has further reinforced this shift. For the first time in India’s penal history, community service has been introduced as a distinct form of punishment for petty offences such as public intoxication and defamation, reducing the burden on prisons while offering a constructive alternative for minor offenders.

Challenges in the correctional system 🔗

Indian prisons are severely overcrowded. A significant proportion of jail inmates are undertrials – people who have not yet been convicted but are awaiting trial. In the landmark case of Hussainara Khatoon v. Home Secretary, State of Bihar (1979), the Supreme Court held that detaining undertrials for longer than their prescribed maximum sentence is a direct violation of Article 21 of the Constitution, which guarantees the right to life and personal liberty. Despite this, the problem of undertrial detention persists at scale.

The Mulla Committee (All India Jail Reforms Committee) recommended recruiting properly trained staff and establishing a dedicated correctional service to improve prison management, but implementation has been uneven across states.

How the components interconnect 🔗

What makes the criminal justice system a “system” – rather than a collection of independent agencies – is the way these components are sequenced and interdependent. Each component has a distinct role, but all are interconnected: the police receive information and investigate; the prosecution scrutinises the charge sheet and presents evidence; the judiciary takes cognisance and adjudicates; and the correctional agencies carry out the sentence. What happens in one component directly affects the functioning of every other.

If police investigations are poor, prosecutors cannot build a strong case. If the prosecution is weak, courts struggle to convict the guilty. If courts are overburdened and delay trials for years, correctional institutions end up housing large numbers of undertrials. The system’s effectiveness is only as strong as its weakest link.

This interconnectedness also means that reform in one area cannot be pursued in isolation. The Malimath Committee’s 2004 recommendations recognised this – suggesting changes across police, prosecution, and judicial procedure simultaneously, rather than piecemeal fixes. The 2023 legislative reforms with the BNS, BNSS, and BSA represent the most recent attempt to address the system comprehensively, modernising all three layers of the legal framework at once.

Reform and the road ahead 🔗

India’s criminal justice system carries the weight of a colonial legacy, a rapidly growing population, and an enormous backlog of cases. The 2023 reforms – particularly the BNSS’s introduction of e-FIRs, mandatory forensic investigation in serious offences, and time-bound processes – represent a significant step toward modernisation. But legislative reform alone is not sufficient.

The real test lies in implementation: whether police stations across rural India will have the digital infrastructure to process e-FIRs, whether courts will receive the additional judges needed to clear backlogs, and whether correctional institutions will have the resources to genuinely rehabilitate rather than simply incarcerate. The pillars of the criminal justice system are structurally sound in design – the challenge is ensuring they function as designed in practice.

What do you think? Given that India’s criminal justice system relies on all four components working in coordination, which pillar – police, prosecution, judiciary, or corrections – do you believe needs the most urgent reform, and why? If the legislature can reshape the entire system through new laws like the BNSS, what responsibility do citizens have in holding these institutions accountable to those laws?

References

1. https://bjs.ojp.gov/library/publications/world-factbook-criminal-justice-systems-india
2. https://prsindia.org/billtrack/the-bharatiya-nagarik-suraksha-second-sanhita-2023
3. https://corridalegal.com/the-bharatiya-nagarik-suraksha-sanhita-2023-executive-summary-and-bare-act/
4. https://www.drishtiias.com/daily-updates/daily-news-analysis/criminal-justice-system-9
5. https://epgp.inflibnet.ac.in/epgpdata/uploads/epgp_content/S001608/P001744/M027830/ET/1521104098StructureofCriminalJusticeSysteminIndiaEPG(2.pdf
6. https://blog.ipleaders.in/criminal-justice-system-in-india/
7. https://www.drishtijudiciary.com/blog/emerging-criminal-justice-system-challenges-and-opportunities
8. https://testbook.com/ias-preparation/criminal-justice-system-in-india
9. https://en.wikipedia.org/wiki/Bharatiya_Nagarik_Suraksha_Sanhita
10. https://egyankosh.ac.in/bitstream/123456789/38802/1/Unit-13.pdf
11. https://vajiramandravi.com/current-affairs/bharatiya-nagarik-suraksha-sanhita-2023/