This gives the story with pics and an explanation of what happened
Deer jumps into Dodge Durago. Good pics.
http://www.snopes.com/photos/durango.htm

Still doesn't explain what's on the top. There's no other damage to indicate he rolled, so that's out.

If the deer went right thought the windshield, the top wouldn't be smashed. If you look at the sidewise pic, if it did fall from above there's a good chance when the head went through the windshield, the back end/legs flipped up and smacked the roof. Then the body bounced/swung by the trapped head & front legs to the hood, where there's almost no damage. I go for the "voided contents" with dirt knocked off a deer that was rolling int he dirt before it was hit . Just a guess.

Either that or it fall face-first on in the windshield, body on top, and the guy, being from Minnasota (eh?), wanted to make certain his free, no-license-necessary deer didn't get away, so he hauled it through the windshield and into the truck.

Wayne