This is hard to explain. This is pretty clear video...of course the CNN report is totally incomplete as to what is going to be done next to evaluate it, etc. If the same area could be photographed again, it would show if it's a rock if it's still in the same place. If it's gone, well...
http://www.cnn.com/video/#/video/bestoftv/2008/01/23/cooper.shot.tuesday.cnn
http://www.cnn.com/video/#/video/bestoftv/2008/01/23/cooper.shot.tuesday.cnn