"I think his friends had something nice planned for his birthday," she said.
"The next morning, I received a call from my friend saying that we should rush to the scene after she had discovered a body lying on the ground," the aunt added.
His body was dumped in front of the aunt's friend's house in Pula Road in Mau-Mau, Nyanga.
Clothes
When the family arrived at the scene, they identified Jack by the clothes he had been wearing.
His younger sister, Linathi Jack, said she didn't want to believe it was her brother.
"When I saw his body, I told my mom that they had made a mistake," the 14-year-old said.