[weegee]

There is a photo of the shell casing and window hole here...

http://kpft.wordpress.com/2007/08/13/additional-images/

[jonascord]

This is an educated WAG, but that looks like 7.62x39. Varnished steel case, maybe, BUT, it looks old, like it's been sitting out for a while. Hard to tell from the color values of the photo.

If it was a standard driveby, my SKS ejected straight up, and the case would have fallen back into the car...

Besides, according to CSI, a forensics guy can feed this case into a machine and the shooter's grade school and highschool records will come out...