Criminal Law: What It Is and What It Does
Chapter Five
Syllabus topic 1, "Concept of Crime. Criminal Law, Criminology as a Science,"
Pages 17 to 20 of 528
In one line
Criminal law is the body of rules that defines which conduct the State will punish, fixes the conditions of responsibility, and prescribes the punishment.
In the wording a student can write in an exam: criminal law comprises the substantive law, which says what is an offence and what punishment it carries, and the procedural or adjective law, which says how an accused is investigated, tried and sentenced; and the two together, with the law of evidence, make up the criminal justice system's rule book.
What the criminal law is for
Ask a criminal lawyer what criminal law is for and you will be given the theories of punishment. Ask a criminologist and you will be given something wider, because punishment is only one of the things the criminal law does. The functions of criminal law are six, and the theories of punishment account for only four of them.
It declares. The first function is to state publicly that certain conduct is unacceptable. This works even when nobody is prosecuted. The offence of dowry death changed what people say about dowry long before it changed how many prosecutions succeeded.
It deters. The threat of punishment is meant to make the conduct unattractive. This is the classical premise and it is examined at length in the chapter on Beccaria.
It incapacitates. A person in prison cannot commit offences outside it.
It reforms, or is supposed to. The reformative theory holds that the sentence should be designed to return the offender to society able to live within the law, and Indian sentencing law formally adopts it.
It retributes. The offender deserves punishment proportionate to the wrong, and the community's sense of justice requires it. Modern retributivism is about desert and limits rather than revenge: it says the punishment must not exceed what is deserved.
And it channels. A function easy to miss. By taking the wrong over, the criminal law replaces private vengeance with an orderly process. That is why the criminal law exists in every society including those with no theory of punishment at all.
The two models of the criminal process
The most useful single idea in this part of the paper is that every criminal justice system is a compromise between two models, and that every controversy about it is a dispute about which model should prevail.
The crime control model treats the repression of criminal conduct as the most important function of the process. It values speed, finality and efficiency. It presumes that the police and the prosecution screen out the innocent early, so that a person who reaches trial is probably guilty. Its image is an assembly line.
The due process model treats the process as an obstacle course. Each stage exists to test the case, and the primary value is not efficiency but the prevention of official error and official oppression. It insists on the presumption of innocence as a rule about how the State must proceed rather than a prediction about who is guilty.
Criminal Law: What It Is and What It Does
Every argument in Indian criminal justice can be located on this axis. Preventive detention, anticipatory bail, confessions to police officers, default bail, the burden of proof under special statutes, the pace of trials: each is a fight about how far the assembly line may be allowed to run.
Sources of Indian criminal law
The general penal statute. The Bharatiya Nyaya Sanhita 2023, which replaced the Indian Penal Code 1860.
Special and local laws. A very large body: the anti-corruption statute, the narcotics statute, the arms and explosives statutes, the food, drugs and environmental statutes, the State's own police and prohibition Acts. Most criminal work in India today is under special laws rather than the general code.
The Constitution. Article 20 forbids retrospective offences, double jeopardy and compelled self-incrimination. Article 21 supplies the guarantee of a fair procedure and, through it, most of the modern rules on arrest, custody and speedy trial. Article 22 governs arrest and detention.
Judicial decisions. The Supreme Court's interpretation of an offence is part of the law of that offence, and where the Court issues directions to fill a legislative gap those directions bind until Parliament legislates.
Not custom. Unlike personal law, criminal law in India admits no source outside the enacted text and its interpretation. A practice sanctioned by a community is no answer to a charge.
Its two limits
It cannot reach what it cannot prove. The rules of evidence are part of the criminal law's design, and conduct that is hard to prove is functionally not criminal however clearly it is prohibited. This is the central insight of the chapter on why white collar crime is hard to prove.
It is expensive and blunt. Every prosecution consumes police time, court time and prison capacity, all of which are finite. A society that criminalises too much finds that it enforces nothing, and the argument for decriminalisation is often an argument about capacity rather than about morals.
A worked example
The State of Maharashtra is considering making it an offence to ride a two-wheeler without a helmet, punishable with imprisonment up to three months.
What functions would the offence serve? Declaration, certainly: it announces that riding bare-headed is unacceptable. Deterrence, if the risk of being stopped is real. Incapacitation and reform, hardly at all: nobody is a career helmet offender.
Which model is being served? Crime control. The offence is designed for volume enforcement at the roadside, and its efficiency depends on the officer's decision being effectively final.
Criminal Law: What It Is and What It Does
What are the due process objections? A power to arrest for a minor offence is a power to harass, and where discretion is wide it is exercised unevenly. The answer the law usually reaches is to keep the prohibition and remove the imprisonment, leaving a compoundable fine, which is what has in fact happened with most traffic offences.
And the criminological question. Would the same money spent on road engineering and on subsidised helmets prevent more head injuries than the prosecutions will? If the answer is yes, the criminal law is the wrong instrument even though the conduct is genuinely harmful. That question is not a legal question, and asking it is what this subject trains you to do.
What beginners get wrong
Criminal law is not the same as criminology. The law is a set of rules; criminology is the study of the behaviour the rules address and of the rules themselves as a social fact. The relationship is dealt with in its own chapter.
"Substantive and procedural" is not a small distinction. An accused acquitted because the search was unlawful has not been found innocent of the conduct. Confusing the two produces the common complaint that criminals get off on technicalities, which is a due process argument being made by someone who has not noticed it.
The theories of punishment are not alternatives to be chosen between. A single sentence usually serves several at once, and Indian sentencing practice mixes them openly.
Quick revision
- Criminal law: substantive law defining offences and punishments, procedural law governing investigation and trial, with the law of evidence.
- The functions of criminal law: declaration, deterrence, incapacitation, reform, retribution, and the channelling of private vengeance into public process.
- Two models: crime control values repression, speed and finality; due process values the testing of the case and the prevention of official error.
- Sources: the Sanhita, special and local laws, the Constitution in Articles 20, 21 and 22, and judicial decisions. Not custom.
- Limits: what cannot be proved is not effectively criminal; and enforcement capacity is finite, which is the practical argument for decriminalisation.
Test yourself
1. Distinguish substantive from procedural criminal law and give an example of each. Substantive law defines the offence and its punishment, for example the provision creating the offence of theft. Procedural law regulates how the State proceeds, for example the requirement that information about a cognizable offence be recorded and the rules governing arrest, bail and trial.
2. Explain the crime control and due process models and give one Indian controversy that turns on the choice between them. The crime control model values the efficient repression of crime and treats the process as an assembly line whose early stages screen out the innocent. The due process model treats the process as an obstacle course designed to test the State's case and prevent official error. The admissibility of confessions made to police officers, and the reversal of that rule in some special statutes, is a direct fight between the two.
Criminal Law: What It Is and What It Does
3. Why does a criminologist say that unprovable conduct is not really criminal? Because the practical content of the criminal law is what the system can establish in court. A prohibition that cannot be proved produces no convictions, exerts no deterrent pressure and leaves the conduct undisturbed, so its existence on the statute book is symbolic. This is why the difficulty of proving white collar crime is treated as a defining characteristic of it rather than as an accident.
The rest of this subject
These notes are cut from the University's printed syllabus. Open the syllabus itself, or the past papers, for the same subject.