14
TUESDAY, SEPTEMBER 11, 1990
"IT
WOULD IN THE NEW DIMENSION TO
IS WORTHWHILE TO BRING IN THE TECHNOLOGY HERE AS IT ENHANCE TECHNICAL SUPPORT OF LOCAL LAW ENFORCEMENT AGENCIES
CRIMINAL
A ACTIVITIES AND ADD INVESTIGATION OF FORENSIC WORK, HE SAID.
DNA
IS A THREE-FOOT-LONG CHEMICAL TIGHTLY WOUND VIRTUALLY EVERY CELL OF THE HUMAN BODY, INCLUDING SEMEN, HAIR AND SKIN SCRAPPING.
CELLS
IN
INSIDE BLOOD,
IT
FROM PERSON TO IN CRIMES
GENETIC INFORMATION WHICH VARIES CARRIES PERSON. INVESTIGATORS USING DNA TECHNOLOGY FIND IT USEFUL AGAINST PERSONS, ESPECIALLY SEX CRIMES WHERE BODY FLUIDS ARE INVOLVED.
TRADITIONAL
THAN
"DNA TEST HAS A GREATER IMPACT ON SEMEN STAIN ANALYSIS BLOOD
ANALYSIS BECAUSE UNLIKE THE STAIN
BLOOD-GROUPING TEST, IT CAN PREFERENTIALLY DETECT CHARACTERISTICS PERTAINING TO FLUIDS OF A SEX CRIME OFFENDER WITHOUT BEING INTERFERED BY THE VICTIM.
THOSE OF
+
'DNA TESTING RESULTS OBTAINED FROM DIFFERENT RAPE CASES CAN
IF THEY HAVE BEEN COMMITTED
BB
BY
DIFFERENT
11
ΤΟ COMPARED,
DETERMINE PERSONS OR THE SAME ONE.'
"THIS WOULD,
OF
IN TURN, DETERMINE THE SIZE OF THE
DETECTIVES TO BE ASSIGNED
ΤΟ
INVESTIGATION
ΓΙ
CASES, THUS MR TSUI
THE NUMBER AND
THE ALLOWING POLICE MANPOWER TO BE DEPLOYED MORE EFFICIENTLY, SAID.
GETTING
THE
FIRST
HE HAS SPENT SIX MONTHS AT THE CHINESE UNIVERSITY HIMSELF ACQUAINTED WITH MOLECULAR BIOLOGY TECHNIQUES AND VISITING
GET METROPOLITAN
RESEARCH HEADQUARTERS IN LONDON TO POLICE'S HAND INFORMATION ON THE LATEST DEVELOPMENTS IN THIS FIELD.
BLOOD-
ALTHOUGH THE DNA TEST HAS AN EDGE OVER THE CONVENTIONAL GROUPING METHOD, MR TSUI SAID THE GOVERNMENT LABORATORY HAS NO PLAN TO DNA PROFILING REPLACE THE BIOCHEMICAL SCIENCES SECTION (BSS) BY THE SECTION.
MORE
BY THAN 600 CASES OF OFFENCE AGAINST PERSON ARE HANDLED
CAN BE THE BSS EVERY YEAR. OF WHICH, ABOUT 200 ARE SEX-RELATED AND
HANDLED BY POTENTIALLY
THE DNA SECTION. BLOODSTAIN EVIDENCE, OF COURSE, CAN ALSO BENEFIT FROM DNA ANALYSIS.
CASES CASES.
MR
TSUI SAID THE SECTION WILL EXERCISE DISCRETION IN CHOOSING CRIMINAL FOR ANALYSIS, DEPENDING ON THE GRAVITY OF INDIVIDUAL
"THE TWO SECTIONS,
+
WHILE USING DIFFERENT METHODS, ARE COMPLEMENTARY TO EACH OTHER, HE SAID.
•
MR TSUI POINTED OUT THAT THE CONVENTIONAL BLOOD GROUPING RESULTS SOMETIMES CARRIED LESS WEIGHT IN COURT BECAUSE OF ITS DISCRIMINATION RATE, RANGING FROM 0.5 TO THREE PER 100 PERSONS.
DISCRIMINATION RATE
+
TEST
LOW
+