Can Brian Laundrie Survive Treacherous Florida Swamp Conditions for 11 Days?

It's day five searching for Brian Laundrie in a 25-thousand acre nature reserve near his parents' Florida home. But with the threat of alligators, snakes, and other predators — is he still alive? And if he's not in the reserve, where could he be? Laundrie, 23, was last seen on Sept. 14 and has been called a person of interest in his fiancée Gabby Petito’s death.