His wife G Paramewary, who was sleeping with their two children, said she woke up in the early hours on Friday when she heard a knock on the door of their apartment.
"I opened the door to find a policeman standing outside. He told me that my husband was dead," The Malaysian Star newspaper quoted her as saying.
"I rushed out and found him lying in a pool of blood only a few metres from our unit," she said.
A neighbour, who spotted Nagenthiran's body, had alerted the police.
The family had shifted to the new apartment six months ago.