The driver responsible for a crash that killed three children and injured four others has detailed the events leading up to the horrific accident for the first time.

Samuel Davidson was three times over the legal alcohol limit, drug-affected and out of control when the ute he was driving mounted a footpath and mowed down seven children in Oatlands, Sydney in 2020.

Siblings Antony (13), Angelina (12), and Sienna (8), along with their cousin Veronique Sakr (11), were all killed instantly.

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Davidson was sentenced on appeal to 20 years in prison, with a non-parole period of 15 years.

In an unprecedented interview with 7NEWS Spotlight, Davidson has spoken from his maximum-security prison about the events leading up to the crash.

The morning of the crash, Davidson said he had gotten up early following a big night.

“I started drinking and I can’t remember much,” he said.

“The boys I was living with, they all got home, we all got into it, and yeah (it’s) pretty blurry from there.”

Davidson said he was waiting to turn at a traffic light that was “taking forever” to turn green.

“I’m not even sure why on Earth we were driving, I just know that we ran the red light,” he said.

“We had no control over the car.

“(I) took the corner so fast that not even a racecar driver could’ve pulled that off in a professional car, so it was just never going to happen.”

Reflecting on his past, Davidson said he used to look forward to getting drunk with his mates every weekend.

“It’s a shame that I had to enjoy life under the influence of alcohol or anything like that to enjoy it, because I can tell you my thoughts about that are completely different now.”

Only months after the deadly crash, the parents of the three siblings shocked the country by publicly declaring they had forgiven Davidson.

Danny and Leila Abdallah said they had drawn on their faith for strength and that forgiveness and justice went hand-in-hand.

Now, five years on from the tragedy, Danny and his children’s killer have come face-to-face for an open and honest conversation about the day that altered the course of both of their lives.

Danny said he wanted to meet Davidson and tell him about his children, as well as deliver an important message.

Don’t miss this powerful 7NEWS Spotlight special, airing on Sunday, 17 August at 8.40pm on Seven and 7plus.