S’porean man, 29, slashes man, 41, after seeing girlfriend drinking with him, man claims she told him she was single

A 29-year-old Singaporean man was sentenced to four months and three weeks’ jail after using a Swiss Army Knife to slash a man who was drinking with his girlfriend.

Brandon Tan Ming Hui pleaded guilty to a charge of voluntarily causing hurt by using a weapon on Jun. 25.

Girlfriend

On Mar. 15, 2025, Tan attempted to contact his girlfriend and noticed that her attitude was unusual, Shin Min Daily News reported.

Tan’s girlfriend attempted to hang up on him, which reportedly angered him.

At about 7pm that day, he contacted his girlfriend again and learned she was drinking with friends at a bar located at CityLink Mall.

Tan went to the bar and saw his girlfriend drinking at a table with two men.

He was reportedly jealous and confronted them.

Tan reportedly demanded to know if they were aware that he and his girlfriend were in a relationship.

One of the men, a 41-year-old, claimed his girlfriend said she was single.

He then explained that they were having drinks as friends.

Slash

In charge sheets seen by Mothership, at about 8:23pm, Tan used a knife and slashed the man on his "right and left hand shoulder".

Tan then fled the scene.

The 41-year-old was conveyed to the hospital for treatment.

He had numbness in his left index finger and lacerations on both hands.

Genting

According to Shin Min, Tan proceeded to the hotel where his girlfriend stayed and discarded the weapon along the way.

He then packed his luggage and waited for his girlfriend to return to the hotel.

When she arrived, he urged her to pack her belongings, claiming that he was taking her to Genting in Malaysia.

A friend of Tan picked him and his girlfriend up and drove them to Woodlands Checkpoint, where Tan was subsequently arrested.

Knife

Shin Min reported that Tan's lawyers claimed he was a deliveryman and the knife he carried was used to open parcels.

His lawyer also argued that there was no evidence indicating that Tan brought the knife intending to inflict harm.

The knife was discarded as it was apparently old and damaged.

The prosecution argued that the 41-year-old was unarmed at the time of the incident and did not provoke Tan.

A premeditated element to Tan's actions was also alleged, citing that he brought the knife and attempted to remove the two men from the bar to confront them.

The prosecution further cited that Tan not only destroyed evidence by discarding the knife but also attempted to leave Singapore.