I was reading the court account of the Australian man who was recently executed in Singapre. In the document, he stated that he was transiting through Changi where he was caught when he set off a metal detector. He was subsequently patted down and the heroine was found.
If he was merely transiting through Changi, why did he have to go through metal detector again? COuldn't he have just stayed in the gate area and catch his conecting Qantas flight without being searched again?