69-year-old retired aircraft technician Kong Peng Yee thought his wife was going to poison him.
So, he hacked her with a knife, inflicting 189 knife wounds on her.
The woman he had been married to for 36 years, Mdm Wong Chik Yeok, died from blood loss.
The gruesome knife attack took place on 13 March last year, at the couple’s HDB flat unit at Block 296C Compassvale Crescent.
A day before that, Kong’s family had just brought him to see a doctor.
The doctor expressed concern that Kong was suffering depression and paraonoid delusions following an eye operation 2 months earlier.
The doctor said that Kong had become worried for his safety and suspected that his family was trying to poison him and that he would die of illness.
It’s believed that he attacked his wife with a knife, then chopper, in that mentally-impaired state.
Kong pleaded guilty to killing his wife today.
He is awaiting sentencing.