Pamela Rauseo described it as the scariest experience in her life.

She was traveling on Miami's Dolphin Expressway when she noticed her 5-month-old nephew, Sebastian de la Cruz, was turning blue. The infant was born premature and with respiratory issues.

She stopped the car, took the little boy out of his car seat and began screaming for help.

Miami Herald photographer Al Diaz was right behind her, right in the middle of a moment in which an infant's life hung in the balance.

"It was rough," Diaz told Local 10 on Friday. "You know, to see her. Yeah, it was hard."

But the veteran news photographer jumped into action.

"I don't know CPR well enough to try and aid with that, so I went and tried to look for help in traffic, so I started waving traffic down," said Diaz.

Diaz flagged down Sweetwater police officer Amauris Bastidas.

"The baby was getting assistance. That's when I stopped and thought, 'OK, things were calming down,' and I think that's when they got the baby breathing," said Diaz. "So I went and got my camera and started taking pictures of the officer who was carrying the baby, and then he stopped breathing again and Pamela got the baby and started doing CPR, and that's the picture that I captured."

WATCH: How to perform CPR on infants versus adults

"As a photojournalist, I capture traumatic moments like that," Diaz added. "I've done it in the past and it is part of capturing history, and photography can change the way people think, the way people see things and lead people to act and in this case, I would hope people see that and they would take up CPR."

Hear from all of the highway heroes who worked together to save little Sebastian's life here.

PHOTOS: Strangers help save baby's life on SR 836

Published On: Feb 21 2014 08:50:59 AM EST
Photos by Al Diaz, The Miami Herald

A Miami Herald photographer captured the dramatic scene on the side of the Dolphin Expressway Thursday when a woman realized her infant nephew wasn't breathing.

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Courtesy: Al Diaz, Miami Herald