Forensic Science Division

Questioned Documents Sections

The Questioned Documents Section provides a comprehensive service to law enforcement departments in all aspects of questioned documents from handwriting and typewriting examination to counterfeiting and forgery. As part of the performance pledge of the laboratory, the target for 85% completion of handwriting and for 90% suspect document cases are 66 and 30 days respectively.

The main client of the section is the Hong Kong Police Force with the rest of the submissions coming from a number of other sources, including the Immigration Department and the Independent Commission Against Corruption.

Video Spectral Comparator (VSC 8000)

Video Spectral Comparator (VSC 8000)

The section is regarded as one of the leading authorities on the analysis of Chinese handwriting, a number of research papers have been published by members of the section.

Key Instruments

The following instruments are used routinely by the Section:

  • Magnetic stripe analyzer
  • Video spectral comparator
  • Electrostatic Detection Apparatus
  • Ribbon Analysis Workstation


Targets and Key Indicators

Key Performance Measures Relating to the Forensic Science Services


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

Targets 2020 (Actual) 2021 (Actual) 2022 (Plan)
85 92 91 85

Targets 2020 (Actual) 2021 (Actual) 2022 (Plan)
90 94 95 90

Targets 2020 (Actual) 2021 (Actual) 2022 (Plan)
99 100 100 99
Key Indicators
Number of Cases Investigated 2020 (Actual) 2021 (Actual) 2022 (Estimate)
Questioned documents 274 246 250