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 (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
The following instruments are used routinely by the Section:
Target is defined as the percentage of completed cases whose individual case-completion time does not exceed a specified number of working day(s)
|Accident reconstruction completed within 66 working days (%)#||90||64||78||90|
|Video/image analysis completed within 88 working days (%)@||90||N.A.||N.A.||90|
|#||The performance has been affected by the growing demand on video/image analysis, a category of work that the Laboratory introduced since 2019.|
|@||New target as from 2021.|
Key indicators are the number of cases investigated
|Number of Cases Investigated||2019