The teenager who pushed an auxiliary police officer while waiting for a police line-up to begin was yesterday sentenced to reformative training.
He had previously assaulted another teen and robbed a foreign worker on different occasions.
In all, he faced one charge each of causing hurt, causing hurt while committing robbery and using criminal force on a public servant.
Liao Bang Xiong, 18, had pleaded guilty to the three charges on April 6. Two other charges were taken into consideration during sentencing.
On Feb 28 last year, Liao and his friends went to a McDonald's restaurant in Superbowl Jurong, where they saw the 16-year-old victim with some friends.
A fight started and Liao punched the victim on his head, hand and back.
Then on Jan 16, while Liao was on bail for the earlier offence, he and two others decided to rob foreign workers.
They were walking along Upper Jurong Road when they saw a 29-year-old Indian national walking alone.
One of them pushed the Indian national to the ground.
Another covered the victim's mouth while the rest punched his head and stomach.
The group took the man's mobile phones - a white Samsung and a silver Nokia - before running to a nearby block of flats.
On Feb 3, Liao got into trouble again when he was at the Jurong Police Division to be part of an identification parade.
While preparing for identification, he got into an argument with an auxiliary police officer and pushed the man on his chest.
As Liao was being taken away from the courtroom yesterday, he turned and nodded at some friends in the public gallery, who flashed him a thumbs up.
A stint at a Reformative Training Centre lasts between 18 and 30 months.
This article was first published on April 28, 2015.
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