MIAMI GARDENS, Fla. -

A 12-year-old boy died Friday, a day after he was hit by a car investigators believe was drag racing, according to Miami Gardens police.

The boy, identified by family members as Nick Murrells, was hit on Thursday afternoon while playing with his younger brother and a friend in the 15200 block of Northwest 29th Avenue.

A red Camaro convertible hit Murrells as the driver raced a black Mercedes-Benz sedan.

"I thought I was dreaming and I started screaming," said his brother, Aaron. "When I ran to him, I was going to move him but they told me not to touch him because it was going to make it worse so I just left him."

"The ball went across the street and then he went to go get it," added Tyrone Maxwell. "The passenger just covered their eyes because they knew they hit the car but they just kept on going."

Murrells was airlifted to Jackson Memorial Hospital, where he died.

"Imagine somebody racing, coming by like they are crazy in their car and hit him and keep driving," said his grandmother, Mary Mathis. "Like he is an animal or something."

"They should have never been racing in the first place, and when it did happen, why didn't they stop to help?" asked Aaron Murrells.

Family members said Murrells enjoyed going to school and playing video games.

"Very, very bright kid," said his guardian, Ozzie Mathis. "That's what he wanted to be when he grew up, was a video game designer."

"Do to others as you would like for them to do unto you," added Mary Mathis. "Do the right thing. That is my grandson. Turn yourself in."

Anyone with information is asked to call Miami-Dade Crime Stoppers at 305-471-TIPS.