How is a ganster, who was sentenced to death, related to the Chairman of CK Tang?

The most famous gunman in recent Singapore history was hanged death. His kidney was donated to the Chairman of CK Tang, Singapore Tycoon Tang Wee Sung, who was jailed briefly due to a failed attempt to get kidney illegally. Finally, he got his kidney, from a man who committed to illegal acts.

I wonder if the rich fellow has ever imagined that one day he would be related to the ganster in this way?

The source is here.