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Forensic Science Division

Physical Sciences Section

[ Key Personnel | Key Instruments | Targets and Key Indicators ]
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Analysis of shoe mark
Analysis of shoe mark

The Physical Sciences Section provides a wide range of service to government departments in the areas of physical examination including traffic accident reconstruction, tyre examination, vehicle number restoration, forgery and counterfeit items and cases involving toolmarks and shoeprints.

Traffic accident reconstruction
Traffic accident reconstruction

 

 

 

 

 

 

 

 

 

Traffic accident reconstruction (TAR) involves the application of various scientific disciplines including mathematics, physics, automotive engineering and scene investigation techniques in deciphering possible cause of road traffic accidents. The forensic examination of failed tyres often provides useful information in determining whether their deflation causes the accident or is a result of the impact in the accident. Vehicle number examination and restoration entails, as the name suggests, the discovery and retrieval of numbers unique to the vehicles concerned as a means of detecting unauthorised vehicle-taking or modification. Forgery and counterfeit items such as precious metals, gems and Hong Kong circulation coins are investigated using state-of-art instruments. The section also deals with a large number of theft-related cases involving the preservation or matching of toolmark and/or shoeprint exhibits.



Key Personnel

The professional staff are actively involved in traffic accident investigation, related laboratory examination and provision of expert opinion in courts.

Senior Chemist and Chemist
(E-mail address)
Tel. No.
Dr. Jack Y K Cheng, Senior Chemist
([email protected])
2762-3738
Dr. K H Ng, Chemist
([email protected])
2762-3739
Dr. K C Poon, Chemist
([email protected])
2762-3739
Dr. C N Tam, Chemist
([email protected])
2762-3736
Dr. C H Tao, Chemist
([email protected])
2762-3737
Dr. C N Tsang, Chemist
([email protected])
2762-3740


Key Instruments

X-ray fluorescence spectrophotometer
X-ray fluorescence spectrophotometer

The following instruments are used routinely by the Section:

  • Comparison microscope
  • X-ray fluorescence spectrophotometer

 

 

Comparison microscope
Comparison microscope

 

 

 

 

 

 

 

 

 

 


Targets and Key Indicators

Targets

Target is defined as the percentage of completed cases whose individual case-completion time does not exceed a specified number of working day(s)

Category Targets 2016
(Actual)
2017
(Actual)
2018
(Plan)
Accident reconstruction completed within 66 working days (%) 90 91 84 90

Key Indicators

Key indicators are the number of cases investigated

Number of Cases Investigated 2016
(Actual)
2017
(Actual)
2018
(Estimate)
Physical sciences 634 676 650