FEB 11, 1985
As Quek Yah Chiang was driving along Sims Avenue, he stopped a 17-year-old boy for directions. He then asked the boy to accompany him in his car and drove to a car park, where he started caressing and having unnatural sex with him.
JULY 1, 1986
Quek used a similar ploy to molest a 16-year-old boy. This time, he drove to Upper Boon Keng Road where he stopped his car and performed indecent acts on the boy.
He was arrested after the two boys made police reports. He was jailed for three months for the two acts of gross indecency in September 1989.
SEPT 7, 1995
Quek stood next to a boy in a toilet at Raffles City Shopping Centre and chatted with him. He then pulled down the Primary 6 pupil's shorts and did an indecent act on him.
Quek ran out but the boy chased him and alerted a security officer.
Quek was caught and jailed nine months in June 1996.