Video shows the tiny infant being carefully pulled out of the wreckage.
Natasha Long said it was as if a guardian angel had appeared out of nowhere to help her baby start breathing again.
In the dashcam video, you can hear the uncle and mom of the 18-month-old child inside the car saying, "Help, help we got a baby in here dying."
"He's a hero, like I would do anything for the man," the baby's mom said. "The man is a hero, he saved my daughter."
It began Tuesday morning, when the baby's parents stepped out of their running car to drop off another child at a bus stop.
"It's a different feeling," said the deputy. "Some nights you go home, and you don't really know if you've made a difference, but in situations like this, you feel it."