At about 11.40pm, the party of CNB officers escorted the appellant from Changi Airport to CNB Headquarters at Police Cantonment Complex, taking with them the two packets and other case exhibits. They arrived at the headquarters at about 12.05am on 13 December 2002. The investigation officer was one Assistant Superintendent Toh Soon Teck (“ASP Toh”). ASP Toh was briefed. He took custody of the accused and the two packets and other case exhibits. The appellant was taken for a routine urine test. Photographs were taken of the appellant and of the various exhibits recovered from his person.
Weight of drug exhibits
8 At about 1.50am, ASP Toh weighed the two packets in the presence of the appellant. He marked the packet taken off the appellant’s back as “Exhibit A” and the packet taken from the haversack as “Exhibit B1”. Both packets were placed in separate plastic “Ziploc” bags for weighing. ASP Toh used an uncalibrated weighing machine and found the approximate weight of each packet to be as follows: