Ngiam Hian Theng Diana

Ngiam Hian Theng Diana is a legal practitioner in Singapore. With documented cases from 2017 to 2023. The lawyer has handled 7 cases in Singapore's courts. Associated with 3 law firms. The lawyer demonstrates particular expertise in criminal law and sentencing. Their track record shows a 29.0% success rate in resolved cases. They have managed 2 complex cases, representing 29% of their total caseload.

Areas of Practice and Expertise

Ngiam Hian Theng Diana has demonstrated expertise across 60 primary practice areas, with significant experience in criminal law and criminal procedure.

Practice Area	Case Volume	Distribution	Expertise Level	Description
Criminal Law	7 cases	8% of total caseload	Highly Specialized89% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 7 cases which represents 8% of their total caseload.
Criminal Procedure	6 cases	7% of total caseload	Experienced73% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 6 cases which represents 7% of their total caseload.
Sentencing	4 cases	5% of total caseload	Highly Specialized90% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 4 cases which represents 5% of their total caseload.
Penal Code	3 cases	4% of total caseload	Experienced73% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 3 cases which represents 4% of their total caseload.
Rape	3 cases	4% of total caseload	Highly Specialized95% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 3 cases which represents 4% of their total caseload.
Sexual Offences	2 cases	2% of total caseload	Highly Specialized93% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 2 cases which represents 2% of their total caseload.
Outrage of Modesty	2 cases	2% of total caseload	Highly Specialized80% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 2 cases which represents 2% of their total caseload.
Criminal Revision	2 cases	2% of total caseload	General Practice18% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 2 cases which represents 2% of their total caseload.
Attempted Rape	2 cases	2% of total caseload	Highly Specialized85% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 2 cases which represents 2% of their total caseload.
Public Prosecutor	2 cases	2% of total caseload	General Practice25% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 2 cases which represents 2% of their total caseload.
Complicity	1 cases	1% of total caseload	Highly Specialized80% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Burden of proof	1 cases	1% of total caseload	General Practice40% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Diminished Responsibility	1 cases	1% of total caseload	Highly Specialized90% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Culpable Homicide	1 cases	1% of total caseload	Highly Specialized95% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Sentencing Framework	1 cases	1% of total caseload	Highly Specialized75% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Mistake of fact	1 cases	1% of total caseload	Experienced65% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Murder	1 cases	1% of total caseload	Highly Specialized95% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Offences	1 cases	1% of total caseload	Highly Specialized90% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Civil Procedure	1 cases	1% of total caseload	General Practice20% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Witnesses	1 cases	1% of total caseload	General Practice30% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Judgments and Orders	1 cases	1% of total caseload	General Practice30% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Evidence	1 cases	1% of total caseload	Experienced50% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Sentencing Principles	1 cases	1% of total caseload	Experienced70% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Newton hearings	1 cases	1% of total caseload	General Practice10% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Consent	1 cases	1% of total caseload	Highly Specialized85% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Robbery	1 cases	1% of total caseload	Highly Specialized90% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Remote Gambling Act	1 cases	1% of total caseload	Highly Specialized95% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Prosecutorial Discretion	1 cases	1% of total caseload	General Practice5% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Criminal motions	1 cases	1% of total caseload	General Practice10% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Prevention of Human Trafficking Act	1 cases	1% of total caseload	General Practice10% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Obstructing, preventing, perverting or defeating course of justice	1 cases	1% of total caseload	General Practice10% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Consent of Public Prosecutor	1 cases	1% of total caseload	General Practice10% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Irregularities in proceedings	1 cases	1% of total caseload	General Practice10% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Defective consent of Public Prosecutor	1 cases	1% of total caseload	General Practice10% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Curative powers of court	1 cases	1% of total caseload	General Practice10% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Prosecution failing to disclose material	1 cases	1% of total caseload	General Practice5% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Consequences of Prosecution’s non-disclosure	1 cases	1% of total caseload	General Practice5% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Credibility of Witness	1 cases	1% of total caseload	General Practice30% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Sexual assault by penetration	1 cases	1% of total caseload	Highly Specialized80% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Prosecutorial Misconduct	1 cases	1% of total caseload	General Practice5% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Prosecutorial Powers	1 cases	1% of total caseload	General Practice5% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Amendment of Charges	1 cases	1% of total caseload	General Practice5% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Prosecution by Attrition	1 cases	1% of total caseload	General Practice5% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Sexual Penetration	1 cases	1% of total caseload	Highly Specialized90% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Mens rea	1 cases	1% of total caseload	General Practice40% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Intoxication	1 cases	1% of total caseload	Experienced70% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Anterograde Amnesia	1 cases	1% of total caseload	Experienced60% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Accident	1 cases	1% of total caseload	General Practice30% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Courts and Jurisdiction	1 cases	1% of total caseload	Highly Specialized90% relevance score	Ngiam Hian Theng Diana has demonstrated deep specialization and significant involvement in complex mattersin this area, handling 1 cases which represents 1% of their total caseload.
Administrative Law	1 cases	1% of total caseload	General Practice30% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Prospective overruling of court judgments	1 cases	1% of total caseload	Experienced50% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Appellate Litigation	1 cases	1% of total caseload	General Practice30% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Assault	1 cases	1% of total caseload	Experienced60% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Breach of Contract	1 cases	1% of total caseload	General Practice5% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Confessions	1 cases	1% of total caseload	General Practice40% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Consumer Law	1 cases	1% of total caseload	General Practice20% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Felonies	1 cases	1% of total caseload	General Practice20% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.
Personal Injury	1 cases	1% of total caseload	Experienced50% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Evidence Law	1 cases	1% of total caseload	Experienced50% relevance score	Ngiam Hian Theng Diana has demonstrated substantial experience and regular engagementin this area, handling 1 cases which represents 1% of their total caseload.
Admissibility of evidence	1 cases	1% of total caseload	General Practice40% relevance score	Ngiam Hian Theng Diana has demonstrated general practice experiencein this area, handling 1 cases which represents 1% of their total caseload.

Law Firm Affiliations

Ngiam Hian Theng Diana has been affiliated with 3 law firms. The most active affiliation involves 5 cases.

Law Firm	Cases Handled	Workload Share	Recent Cases
Quahe Woo & Palmer LLC	5 cases	71% of cases	PP v CNK: Culpable Homicide & Diminished Responsibility in River Valley High School Killing(Dec 2023) Public Prosecutor v Ridhaudin Ridhwan: Rape, Attempted Rape, Sexual Penetration, and Outrage of Modesty(Aug 2019) Public Prosecutor v Ridhaudin Ridhwan: Rape, Attempted Rape, Sexual Penetration, Outrage of Modesty, Consent, Mistake of Fact(Apr 2019)
Independent Practitioner	1 cases	14% of cases	Low Song Chye v Public Prosecutor: Voluntarily Causing Hurt & Sentencing Appeal(Jun 2019)
Quahe Woo and Palmer LLC	1 cases	14% of cases	Lau Jian Bang v Public Prosecutor: Remote Gambling Act Sentencing Appeal(Oct 2019)

Case Complexity Analysis

Analysis of Ngiam Hian Theng Diana's case complexity based on the number of parties involved and case characteristics.

Complexity Overview

Average Parties per Case: 2.6
Complex Cases: 2 (29%); Cases with more than 3 parties

Complexity by Case Type

Type	Cases	Avg Parties	Distribution
Lost	52.8 parties avg	2.8	71%
Won	22.0 parties avg	2.0	29%

Complexity Trends Over Time

Year	Cases	Average Parties
2017	12.0 parties avg	2.0
2018	12.0 parties avg	2.0
2019	43.0 parties avg	3.0
2023	12.0 parties avg	2.0

Case Outcome Analytics

Analysis of Ngiam Hian Theng Diana's case outcomes, including distribution by type, yearly trends, and monetary outcomes where applicable.

Outcome Distribution

Outcome Type	Cases	Percentage
Lost	5(71%)	71%
Won	2(29%)	29%

Monetary Outcomes

Currency	Total Amount	Average	Cases
SGD	0.00	0.001 cases	1

Yearly Outcome Trends

Year	Total Cases	Outcome Distribution
2017	1 1	Won: 1 cases (100.0%)
2018	1 1	Lost: 1 cases (100.0%)
2019	4 31	Lost: 3 cases (75.0%) Won: 1 cases (25.0%)
2023	1 1	Lost: 1 cases (100.0%)

Case History

Displaying all 7 cases

No.	Case	Decision Date	Party & Outcome
1	PP v CNK: Culpable Homicide & Diminished Responsibility in River Valley High School Killing 27 Dec 2023 CNK (Defendant)Lost	27 Dec 2023	CNK (Defendant): Sentence of 16 years of imprisonment imposedThe accused was sentenced to 16 years of imprisonment. The Defence sought a sentence of around five years of imprisonment.
2	Lau Jian Bang v Public Prosecutor: Remote Gambling Act Sentencing Appeal 23 Oct 2019 Lau Jian Bang (Appellant)Won	23 Oct 2019	Lau Jian Bang (Appellant): Appeal AllowedAppeal allowed; sentences of imprisonment substituted with a fine of $5,000 for each proceeded charge (assumed SGD, as the judgment originates from Singapore).
3	Public Prosecutor v Ridhaudin Ridhwan: Rape, Attempted Rape, Sexual Penetration, and Outrage of Modesty 18 Aug 2019 Ridhaudin Ridhwan Bin Bakri (Defendant)Lost	18 Aug 2019	Ridhaudin Ridhwan Bin Bakri (Defendant): Convicted and sentencedRidhwan was convicted on the 1st, 2nd, and 3rd Charges and sentenced to a total of 13 years’ 1 month and 13 days’ imprisonment and 13 strokes of the cane.
4	Low Song Chye v Public Prosecutor: Voluntarily Causing Hurt & Sentencing Appeal 05 Jun 2019 Low Song Chye (Appellant, Respondent)Lost	05 Jun 2019	Low Song Chye (Appellant, Respondent): Appeal DismissedAccused's appeals against conviction and compensation order were dismissed.
5	Public Prosecutor v Ridhaudin Ridhwan: Rape, Attempted Rape, Sexual Penetration, Outrage of Modesty, Consent, Mistake of Fact 22 Apr 2019 Asep Ardiansyah (Defendant)Lost	22 Apr 2019	Asep Ardiansyah (Defendant): LostConvicted on all charges.
6	Public Prosecutor v Chia Kee Chen: Murder, Common Intention, and Sentencing 26 Jun 2018 Chia Kee Chen (Respondent, Appellant)Lost	26 Jun 2018	Chia Kee Chen (Respondent, Appellant): Appeal DismissedChia Kee Chen's appeal against his conviction was dismissed.
7	Chang Kar Meng v Public Prosecutor: Rape and Robbery Sentencing Review 29 Mar 2017 Chang Kar Meng (Appellant)Won	29 Mar 2017	Chang Kar Meng (Appellant): Appeal AllowedAggregate imprisonment sentence reduced to 15 years with 24 strokes of the cane.