WATCH: Police hunt for hit-and-run driver in Florida

WATCH: Police hunt for hit-and-run driver in Florida

Transcript for Police hunt for hit-and-run driver in Florida

Now to the horrific crash and a father’s desperate plea. You may have seen this video by now. His 19-year-old son trapped inside that sedan as it flipped over and over, fighting for his life tonight, as police hunt for the van driver that set that accident in motion. And now, what may be the biggest break in the case so far. Here’s ABC’s erielle reshef. Reporter: Tonight, this van believed to be at the center of that terrifying hit and run crash, now impounded as authorities hunt for a suspect. And the victim’s father speaks out. Somebody out there knows what happened, and they know the person that was driving the car. And no one is coming forward. Reporter: 19-year-old Jackson Kelley in critical condition. My child is lucky to be alive. Reporter: After this violent collision caught on surveillance camera in Sarasota, Florida, Thursday. Seeing him on that — in the icu is — is — is very, very hurtful. Reporter: Watch, as the van tries to make a left turn, veering into oncoming traffic, clipping Jackson’s sedan, flipping it more than four times as it narrowly misses a hotel pool, before slamming into a concrete wall and landing on its roof. Horrified onlookers racing to help. He was bruised up pretty bad. Reporter: But that van speeding off seconds after impact. To see a car crash with that violence and velocity, to see it and then walk away, clearly that person was running from something. Reporter: Tom, Jackson’s family tells us he suffered brain trauma, but his doctors are cautiously optimistic about his progress. Authorities want to hear from anyone with information about the crash. Tom. Teen still fighting for his life. All right, erielle, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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