It was learnt that Geng came to the house and knocked at their door around 8 pm, and later forced himself into the house around 9pm.
A source narrates that Geng pushed the mother of the deceased away and entered her daughter’s room and stabbed her to death.
“We then began shouting and neighbours came to our rescue and apprehended him.
“She was immediately taken to hospital where she was later certified dead.”
Meanwhile, Geng has been dating Ms Buhari for years before she dumped him to marry a Nigerian suitor.
Her marriage crashed recently after her husband discovered her chats with Mr Geng in her phone and suspected they were still dating.
After the divorce, Mr Geng returned again, but Ms Buhari rejected his latest overtures.