Do you think they get saved from near the crash site or did they somehow find their own way out?

I’ve just binged this show in 2 days and I’m obsessed. It’s one of the best shows I’ve ever watched.

I was just thinking if they got saved from where the bodies are wouldn’t the police know some of them were murdered by their bones? Knife marks etc or do you think they somehow found a way out and claimed they don’t know where the plane went down so the remains are never found?