He punched a fellow cabby in the head and face again and again.
The attacker, Chng Chuan Siak, 53, alleged he did so because the victim had made vulgar remarks about his mother who allegedly did not have long to live.
But Mr Low Swee Kuan, 39, denied provoking Chng in a statement he gave to the police.
Yesterday in court, Chng was convicted for voluntarily causing hurt to Mr Low.
District Judge Low Wee Ping adjourned sentencing for three weeks for the prosecution to determine if Chng's claim was true.
The incident happened on Dec 5 last year, at around 6pm at the taxi stand of Singapore Expo Foyer 2.
Mr Low had stopped his taxi behind Chng's, and when the taxis in front moved off but Chng's didn't, Mr Low drove to the side to see if Chng was moving forward.
According to court documents, Chng "then gestured wildly and was seen mumbling before moving his taxi forward".
Mr Low then reversed to join the queue again. Then, Chng alighted from his taxi and approached Mr Low's vehicle, yelling.
Mr Low claims that he wound down his window to explain that he only wanted to check if Chng was moving his taxi forward.
But Chng claims that Mr Low hurled a string of Hokkien vulgarities about Chng's mother.
It was then that he punched Mr Low, inflicting multiple superficial head and facial injuries.
Chng said in court that at that time, he had just received news that his mother's illness was incurable. He added through an interpreter: "(Mr Low used) very vulgar language three times. That's why I told him that my mother doesn't have long to live, and I don't allow anyone to scold my mother."
An eyewitness account verified that Chng did say words to that effect, leading Judge Low to say: "So it's reasonable that the victim said something to the accused."
The eyewitness said she "could not hear what the other driver (Mr Low) was saying at all". But Assistant Public Prosecutor (APP) Lydia Goh said that Mr Low denied any provocation, saying he only wound down his window.
Judge Low said: "I think the investigating officer (has) got to do more work."
In mitigation, Chng admitted that he was in the wrong.
He added: "I have been driving for 20 over years. This incident is what I feel most remorseful about."
Judge Low asked APP Goh to verify if Chng did indeed find out that his mother's illness was terminal on or before the time of the incident, and if Mr Low did utter such words to Chng.
He said: "It looks as though the accused was a model driver and citizen, then he went into a rampage. It doesn't make sense."
The case will be mentioned again on May 29.
This article was first published in The New Paper.
53yo whack 39yo, steady man
lucky not brother hammer, if not worst thing would happen,
10 minutes of rage, many hours wasted going to court, lots of money wasted that could have been spent on entertainment, moments of anxiety that could have been avoided... all because of 10 minutes of rage.
pai seh.