This is the full-content study version of Chapter 2 — read it for revision or self-study. Your teacher will teach from the matching slide deck. Deeper case treatment and essay practice live in the Crime Study Guide. Everything here maps to the NESA Crime syllabus dot points under "The criminal investigation process." The running theme is the balance between the rights of the suspect and the rights of the community — and the role of police discretion.
Syllabus: police powers.
Laws are of little use without a body to enforce them — voluntary compliance by every member of the community is unrealistic. The NSW Police Force is responsible for detecting crime, keeping the peace, and responding to breaches of the criminal law. Because police act on behalf of the state, their powers must be carefully defined and limited — every power given to police is, in effect, a corresponding limit on individual liberty. The central tension of this whole chapter is balancing effective law enforcement against the rights and freedoms of individuals.
LEPRA is the single most important Act for this chapter. It consolidates most NSW police powers — stop, search and detain; entry; arrest; the use of warrants; and the rules for detention and questioning after arrest (Part 9) — and sets out the safeguards that come with them. Where you can, cite LEPRA rather than "the law".
The threshold for most search powers is that the officer suspects on reasonable grounds. This is more than a hunch — it must be based on some fact or circumstance. It is the main legal check on the exercise of police discretion, and a classic point for evaluating whether the law balances enforcement against individual rights.
Discretion is the power to choose whether and how to act — for example, whether to issue a caution, a fine, or a charge, or whether to stop and search at all. Discretion makes policing flexible and humane, but it can also be exercised inconsistently, which raises concerns that some groups are policed more heavily than others.
Because police powers can be abused, independent oversight bodies exist to receive complaints and investigate serious police misconduct:
The LECC began operating on 1 July 2017 and is the independent watchdog for the NSW Police Force. It replaced the former Police Integrity Commission and took over the police-oversight role previously held by the NSW Ombudsman, consolidating oversight into a single body that detects, investigates and oversees the handling of serious police misconduct and corruption.
Older textbooks (and the class notes) still refer to the Police Integrity Commission and the NSW Ombudsman for police complaints. For the current law, name the LECC (from 2017). You can mention the PIC/Ombudsman as the former arrangement to show the law has been reformed.
Police powers are regularly expanded and contested. A good worked example is the move-on direction. LEPRA lets police direct a person to leave a public place and not return for a period, where their behaviour (for example, intoxicated and disorderly conduct) meets the statutory grounds. Amendments have broadened these powers over time — including a continued intoxicated-and-disorderly offence for people who fail to comply.
Syllabus: reporting crime.
Most investigations begin because a member of the public reports a crime. The community therefore plays an essential role: without reports, many offences would never come to police attention. Reporting can be direct (000, attending a station) or anonymous.
Crime Stoppers is a national, community-based program that lets people report crimes, pass on information about unsolved crimes, or report suspicious activity — anonymously, by phone or online. Anonymity encourages people who would otherwise fear reprisals to come forward, which supports both investigation and prevention.
Quote figures as approximate and cite the source (Crime Stoppers, or BOCSAR for NSW recorded-crime data). A single up-to-date statistic is worth more in an answer than a vague claim — but always link it back to a point about effectiveness.
A large share of crime is never reported — the "dark figure" of crime. Reasons include:
Some categories of crime are heavily under-reported, which distorts crime statistics and hampers the criminal justice system's ability to respond. Domestic, family and sexual violence is a leading example — victims may fear the offender, depend on them financially, or distrust the process.
Figures drawn from ABS Personal Safety Survey data (rounded). Women are far more likely than men to experience violence by an intimate partner or family member; men are more likely to experience violence by a stranger.
Syllabus: investigating crime — gathering evidence, use of technology, search and seizure, use of warrants.
Once a crime is reported, police gather evidence to build a brief that can support a charge in court. Speed matters: witnesses give the freshest and most reliable account soon after the event, and physical evidence degrades or is lost. Evidence is documented carefully in situ (photographed, recorded, bagged and labelled) to preserve its integrity and its value in court.
Sets out how evidence may be gathered and when it is admissible in court. Evidence must generally be relevant and lawfully obtained. A court can exclude improperly or illegally obtained evidence — a powerful safeguard against police cutting corners. This links the investigation stage directly to the trial.
Expert and DNA evidence can be very persuasive to a jury — but it is not infallible. Keep that phrase handy: it sets up the reliability point you develop with the Farah Jama case below.
Technology has transformed investigation — DNA profiling, fingerprint and facial-recognition databases, CCTV and automatic number-plate recognition, mobile-phone and metadata analysis, and body-worn cameras. Used well, these tools solve crimes faster and can re-open cold cases years later, and they can exonerate the innocent as well as identify the guilty.
A person must generally consent to a DNA sample (a mouth swab or blood sample). If they refuse, police may in defined circumstances obtain a court order authorising a sample to be taken using reasonable force. DNA can place a suspect at a scene — but a "match" only shows contact with the sample, not how or when it got there, and samples can be contaminated in collection or laboratory handling.
Farah Jama was convicted of rape almost entirely on a single DNA sample. He had an alibi and there was no other evidence linking him to the scene — no CCTV, no eyewitness placing him there. It later emerged the DNA sample had been contaminated: material from an unrelated examination of Jama on another day had cross-contaminated the swab. His conviction was quashed in 2009 and a review followed into DNA-handling standards.
Search-and-seizure powers are among the most controversial police powers because they intrude on privacy and property. Under LEPRA, police may stop and search a person, or their bag, vehicle or possessions, where they suspect on reasonable grounds that the person is carrying something such as a prohibited drug, a stolen item, a dangerous implement or a thing used to commit an offence — and may seize such items.
Every search power trades privacy for public safety. The reasonable suspicion requirement is the check that stops random or discriminatory searches — evaluate whether it works in practice, not just on paper.
A warrant is a legal document issued by an independent judicial officer (a magistrate or judge) authorising police to do something that would otherwise be unlawful — most often to search premises or to arrest a named person. To obtain a search warrant, police must satisfy the officer that there are reasonable grounds; the warrant states what may be searched and what may be seized.
This judicial oversight is a key safeguard: by requiring an independent officer to approve intrusive action in advance, the warrant system caps police discretion and reduces the risk of misuse. Police may video-record the execution of a warrant, both to gather evidence and to protect themselves against later allegations of misconduct.
Frame warrants as a rights-protecting mechanism: they insert an independent umpire between the police and the citizen. That is exactly the "balancing individual rights against community needs" idea the markers want.
Body-worn video cameras were rolled out to NSW frontline police from about 2015. They record interactions on duty and can capture strong contemporaneous evidence — for example, of a victim's injuries or demeanour at a domestic-violence callout. They also promote accountability on both sides: officers and members of the public tend to moderate their behaviour when they know it is being recorded, and footage can resolve disputed accounts of what happened.
Syllabus: arrest, charge, summons, warrants.
The lawful grounds for arrest without warrant are set out in LEPRA. An officer may arrest a person where they:
Critically, LEPRA requires that arrest is exercised for a proper purpose — such as to stop the offence, ensure the person appears in court, preserve evidence, or protect safety. Arrest should be a last resort, not a routine first step: if a court attendance notice will do, that should be used instead.
The "arrest as a last resort" principle is a favourite exam point. It shows the law trying to minimise interference with liberty — an arrest is a serious deprivation of freedom, so the power is hedged with purpose requirements and alternatives.
After arrest, a suspect is taken to a police station where police decide whether to charge them. At the end of the lawful investigation period (see 2.6), the person must be either charged or released — police cannot hold someone indefinitely. Once charged, the accused may be fingerprinted and photographed, and must be brought before a court as soon as practicable, where a bail decision is made.
The syllabus lists "summons", but NSW no longer uses that term for commencing most criminal matters. In practice you should know the Court Attendance Notice (CAN) and the subpoena. Mention that "summons" is the older word and CAN is the current mechanism.
Syllabus: bail or remand.
Bail is the conditional release of an accused person into the community while they await their trial or hearing. The alternative is remand — being held in custody until the matter is dealt with. This decision sits at the heart of the "presumption of innocence vs community safety" balance, because the accused has not yet been found guilty.
If bail is refused, the accused is held on remand. Remand prisoners are un-convicted, but held because release is judged unsafe or unsuitable. If the person is later found guilty and sentenced to prison, time already spent on remand is normally deducted from the sentence. Note the equity concern: people who are homeless or disadvantaged can find it harder to meet bail conditions and so are more likely to be remanded.
Commenced May 2014, replacing the Bail Act 1978 (NSW). Its centrepiece is the "unacceptable risk" test. It was then toughened by the Bail Amendment Act 2014, which added the "show cause" requirement for serious offences (commenced 28 January 2015).
Where bail is granted, conditions can be imposed to manage risk — for example reporting to a police station, a curfew, an electronic monitoring anklet, a residence condition, non-association or non-contact conditions, surrendering a passport, or a surety (a sum of money pledged, often by another person, forfeited if the accused fails to appear).
Man Haron Monis carried out the fatal Lindt Café siege in Sydney's Martin Place in December 2014. At the time he was on bail — he had been charged with being an accessory to the murder of his former wife, and separately with dozens of sexual-assault offences, yet was released into the community. The coronial inquest into the siege, whose findings were delivered in May 2017, examined how he came to be on bail and criticised aspects of the handling of his bail.
Monis was on bail for accessory to murder and sexual assault charges — not for terrorism. The bail decisions and the DPP's handling of them were scrutinised by the inquest. Keep the facts precise; markers reward accuracy over drama.
Syllabus: detention and interrogation, rights of suspects.
After a lawful arrest, police may detain a suspect to investigate the offence and to question (interrogate) them — but only for a limited time and subject to strict safeguards. These rules are in Part 9 of LEPRA, and they exist to prevent oppressive questioning and unreliable (e.g. coerced) confessions.
Certain reasonable time-outs pause the clock and are not counted in the investigation period, including:
Don't just recite "6 hours". The time-outs are the interesting bit: they mean a suspect can be at the station much longer than six hours in real time. That's a point about how a safeguard can be stretched — good for evaluating effectiveness.
A detained suspect keeps important rights, which balance the state's investigative power against the individual's liberty:
If police breach these rules, any confession or evidence obtained can be ruled inadmissible under the Evidence Act 1995 (NSW). The rights of suspects are not "letting criminals off" — they protect the reliability of the process and the innocent against wrongful conviction.
You should be able to: explain the source and limits of police powers under LEPRA and the role of the LECC; describe how and why crime is reported (and under-reported); explain how police gather evidence and use technology, search & seizure and warrants (with the Evidence Act 1995 and the Jama reliability point); set out the grounds for lawful arrest, the CAN, and "arrest as a last resort"; apply the Bail Act 2013 unacceptable-risk and show-cause tests (with the Monis/Lindt Café case); and explain the detention period and the rights of suspects. Test yourself in the Crime Study Guide → Self-Test. Everything here threads back to one question: does the law fairly balance the rights of the suspect against the rights of the community?