When Mr Tang Ru Qiu saw his only son in a neck brace, semi-conscious and unable to talk at Changi General Hospital, he almost fainted from the shock.
Mr Tang Zi Liang, 20, was driving his parents' Toyota sedan when it hit a tree at Tampines Road on Thursday morning.
His rear passengers, Miss Phoebe Lo Huiling and Miss Michelle Phoe Min Yi, died on the spot while the front passenger, Miss Isabella Tay Mei Na, escaped with minor injuries.
Mr Tang was trapped in his seat and had to be rescued by Singapore Civil Defence Force officers with hydraulic tools.
He was later arrested on suspicion of dangerous driving causing death.
His father, who is in his 50s, told The New Paper in Mandarin on Friday: "I am worried to death. He is my only child and we are depending on him to support us in the future."
He said his son's injuries were serious but not life-threatening.
Doctors have told him that they will still have to wait and see.
"For now, I just want him to get better, but I am also worried about what happens after that (with the police case). My heart cannot take this," said Mr Tang, adding that he has a weak heart and cannot become agitated.
"When I saw him, I almost fainted."
There has been speculation online about whether his son had been driving under the influence of alcohol.
Mr Tang lashed out at this, saying: "What people are saying is nonsense.
"The blood alcohol report is not even out yet and won't be out for some time. We don't even know the truth."
While he did not know the passengers in the car, he was upset that two girls lost their lives in a car driven by his son.
Said Mr Tang: "Who would have expected this to happen? It's tragic."
Asked if he knew of his son's activities as a club DJ, Mr Tang said he was not able to keep track of his son's movements because of his poor health. He said his son is a music lover and responsible person.
When The New Paper visited the younger Mr Tang in hospital on the day of the accident, a childhood friend said he is a popular DJ at clubs and his popularity is evident on his Facebook page.
The senior Mr Tang said he will not be attending the wakes of Miss Lo and Miss Phoe as his heart cannot take the stress and that his relatives will attend on the family's behalf instead.
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