I don't know who Dave is in this story. He could be an ordinary person with an extraordinary story, or maybe he's someone known in a specific community.
I'm not sure specifically who Dave is without more information. He could be an ordinary person with an extraordinary story, or someone well - known in a particular community or field.
It depends. Sometimes stories are based on real events but have fictional elements added. Without specific details about 'Dave', it's hard to say for sure.