Amy Blanc Lacy, a script supervisor renowned for her contributions to The Walking Dead and Halt and Catch Fire, has died following a high-speed hit-and-run collision in Atlanta on September 1, according to police.

Lacy, 62, was in the back of her son Oliver Lacy's vehicle when 31 year old Buck Rollins allegedly smashed into their car at 91 mph in a 45 mph zone.

The Atlanta Police Department said Rollins lost control of his vehicle, mounted a kerb, and launched his car into Lacy's car.

Lacy suffered life-threatening injuries and was admitted to hospital in a coma, losing her fight for life four days later.

Her sons, Oliver, 23, who was behind the wheel, and Adrian, 25, were also taken to hospital following the collision.

An arrest affidavit secured by People reveals that Rollins fled the scene and was filmed on camera retrieving his golf clubs and "walking away casually from the scene of the accident," reports the Mirror.

Rollins allegedly informed police he had been playing golf before the crash and did not understand why he departed, maintaining he experienced a seizure and walked home.

Nevertheless, investigators uncovered data from the airbag control modules showing Rollins lifted his foot from the accelerator and started braking 2.5 seconds before impact, "calling into question his claim of having a seizure during the course of this accident."

Rollins surrendered himself to authorities and has been charged with first-degree homicide by vehicle, hit and run, reckless driving, and speeding.

Custody records show he was freed on a £70,000 bond.

Witness Stacey Elgin informed Fox 5 that she witnessed the collision and tried to help. "I did a U-turn and went back.

"And at that point, that's when I see this car fleeing.

"I did follow the car because this person obviously caused a terrible wreck... trying to get out of the situation," she said.

Lacy was held in high regard throughout the film and television industry for her precise craftsmanship.

Actor Khary Payton, who portrayed King Ezekiel on The Walking Dead, posted a heartfelt message on Instagram: "Amy. You've always been an angel.

"I'll be looking for you in all the little beautiful things.

"Love and miss you."

Director Erin Lee Carr praised her as a "bright light" on set, highlighting that Lacy "brought her meticulous eye and fierce heart to projects."

A GoFundMe campaign has been established to help cover funeral costs and provide assistance to Lacy's family.

The fundraising page states: "Amy Lacy was a radiant and beautiful presence in the Film Community, touching the lives of so many.

"Amy raised three wonderful children, filling their lives with joy, laughter and dance.

"Amy, your spirit will forever illuminate our lives, and you will continue to dance in our hearts."