I mentioned this in another post this morning. During the playoff with Daly and Singh at the Houston open. A photographer accidently hit Daly's ball. The announcers said the ruling is that he can place the ball if they know the exact position of the ball before the incident occurred. Unfortunately they did not so he was allowed to drop the ball.

I would say since this is really a 3rd party person like the photographer was, that he could place the ball where it was.