It started with an affair and ended in the death of an innocent man.
A food stall worker known only as Liu, 51, was divorced by his wife last year after she found out he was keeping a mistress.

She took their 10-year-old daughter with her.

From there, things just went from bad to worse.

A month ago, Liu lost his job at the noodle stall and was promptly dumped by his mistress too, reported Apple Daily.

Loveless and unemployed, he tried to patch up with his ex-wife, Madam Dai.

Liu soon found out that his ex-wife was growing closer to her supervisor at BMW Hong Kong.

The latter, Mr Chen Hanji, 53, had been with the firm for close to 20 years, and was in charge of the maintenance department.

Liu discovered that Mr Chen and Madam Dai visited a cafe near their workplace together almost every day.

He became convinced that Madam Dai was having an affair with Mr Chen, who is married with two children, aged 15 and 16.

Liu thought that his ex-wife might be giving him a taste of his own medicine.

Questioned

Furious, Liu allegedly stormed into Madam Dai's house and questioned her about her relationship with Mr Chen.

He accused her of being the one to break up their marriage by seeing Mr Chen behind his back.

He also blamed Mr Chen for being the third party and sabotaging his efforts to patch things up with Madam Dai.

After a huge quarrel, Liu left in a fit of anger.

On Tuesday afternoon, Mr Liu went to a household goods store and bought a 30cm-long kitchen knife.

Stuffing the knife into a plastic bag, he went to the cafe which Madam Dai and Mr Chen frequented and waited for the couple to show up.

About 10 minutes later, Mr Liu saw Madam Dai, Mr Chen and another male colleague approaching the cafe.

Liu allegedly pulled out his knife, pointed it at Mr Chen and shouted: 'You stole my wife!'

He then slashed Mr Chen's face, cutting his spectacles in half.

According to Oriental Daily, Mr Chen tried to edge away while Madam Dai and the male colleague struggled with Mr Liu.

During the struggle, Madam Dai's left arm and leg were slashed.

By this time, Mr Chen had collapsed onto the ground.

Liu allegedly continued attacking, jumping on his victim and stabbing him in the neck, chest, abdomen, hands and legs.

Mr Chen was stabbed eight times in total.

Eyewitnesses claimed that Madam Dai shouted at Liu to stop and leave, but he ignored her.

Liu was allegedly about to land another blow on Mr Chen when station sergeant Huang Zhengqiang, who was on patrol in plainclothes, heard the commotion and rushed to the scene.

Grabbing hold of Liu's right arm, he twisted the bloodied knife out of his grip, letting it fall to the ground.

Sergeant Huang pinned Liu down, but the latter kept struggling and screaming: 'You stole my wife!'

Other police officers and an ambulance crew arrived on the scene and took Mr Chen to hospital, but he later died of his injuries.

Madam Dai, who was also taken to hospital, blamed herself for Mr Chen's death.

She told her colleagues: 'My ex-husband saw me having lunch with Mr Chen and thought we were in a relationship.'

That evening, about 20 of Mr Chen's colleagues brought roast duck rice, steamed meat pie and a bottle of beer to the scene of the crime and placed them there as offerings.

The owner of the cafe said: 'I saw the man stabbing Mr Chen, and rushed out to catch him after he had collapsed. If I had reacted quicker and used our menu stand to ward off the blows, Mr Chen might have survived.'

Kowloon Police said Liu had been detained for further investigations.