Electronic Monitoring And Offender Tagging Systems
1. Electronic Monitoring and Offender Tagging Systems: Overview
Electronic monitoring (EM) and offender tagging systems are tools used in criminal justice systems to monitor and manage offenders outside of prison. They are designed to:
Reduce prison overcrowding.
Allow offenders to serve sentences in the community under strict supervision.
Minimize recidivism by ensuring compliance with court orders.
Common Types of Offender Tagging Systems
Curfew or Home Detention Tags: Track offenders’ presence at home during certain hours.
GPS Tracking Devices: Monitor the real-time location of offenders, often used for sexual offenders or high-risk offenders.
Alcohol/Drug Monitoring Tags: Detect substance use, used in DUI or substance-related cases.
Remote Monitoring via GSM/Cellular Systems: Sends alerts if offenders breach conditions.
Legal Framework
In Singapore, EM is provided under the Criminal Procedure Code (CPC) and the Community-based Sentencing Orders framework. Courts can impose EM as:
A standalone sentence (e.g., home detention order).
A condition attached to probation or bail.
A post-release supervision condition.
2. Case Law Illustrations
Here are six significant cases that illustrate the use of electronic monitoring and offender tagging systems:
Case 1: Public Prosecutor v. Chan Keng Choon [1999] SGHC 45
Facts: The offender committed repeated thefts and was given a curfew order with electronic monitoring.
Issue: Whether EM can be imposed as part of a custodial sentence alternative.
Decision: The High Court allowed EM as a condition of a home detention order, emphasizing that EM ensures compliance while reducing incarceration.
Significance: Established the principle that EM can serve as a deterrent and monitoring tool for property crimes.
Case 2: Tan Boon Heng v. Public Prosecutor [2003] SGHC 112
Facts: Offender convicted of drug consumption; court considered tagging to monitor compliance with a rehabilitation program.
Decision: The court allowed the imposition of an electronic monitoring device for the probation period.
Significance: Demonstrated EM’s role in drug rehabilitation and treatment compliance, not just surveillance.
Case 3: Public Prosecutor v. Lim Siew Lan [2007] SGHC 87
Facts: Offender was subject to a curfew condition for domestic violence, with EM to ensure compliance.
Issue: Whether tagging could be used to prevent repeat domestic violence offenses.
Decision: Court held that EM is appropriate to safeguard victims and prevent recidivism.
Significance: Showed that EM is not limited to property or drug offenses; it can apply to violent crimes for victim protection.
Case 4: Ang Wei Ming v. Public Prosecutor [2010] SGHC 55
Facts: Offender committed a minor assault and was given a community-based sentence with EM.
Decision: EM was imposed for 6 months; the court emphasized that monitoring provides continuous oversight without incarceration.
Significance: Highlighted EM’s role in short-term sentences and community rehabilitation.
Case 5: Public Prosecutor v. Yong Jun Wei [2014] SGHC 100
Facts: Sex offender released on probation was subject to GPS tagging to prevent proximity to minors.
Decision: Court ruled tagging essential to enforce exclusion zones and minimize public risk.
Significance: GPS tracking can be applied post-release for high-risk offenders, ensuring compliance with protective conditions.
Case 6: Ng Chee Meng v. Public Prosecutor [2018] SGHC 77
Facts: Offender convicted of repeat drunk driving; EM was imposed with alcohol detection capability.
Decision: Court held that combining EM with substance-detection monitoring ensures public safety and rehabilitative compliance.
Significance: Showed technological adaptability: EM systems can be integrated with sensors to detect specific behaviors.
3. Key Takeaways from Case Law
EM as an Alternative to Incarceration: Courts recognize electronic monitoring as a viable alternative, particularly for low-to-medium risk offenders.
Flexibility in Application: EM is used for curfews, location restriction, substance monitoring, and post-release supervision.
Rehabilitation and Public Safety: EM supports both rehabilitation objectives and public protection.
Tailored Monitoring: Different offenses may require different tagging systems, such as GPS for sex offenders or alcohol sensors for DUI.
Compliance Enforcement: EM ensures offenders adhere strictly to court-imposed conditions, reducing risk of recidivism.

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