According to this source, 13 of 16 entrance wounds in the Twin Peaks "biker shootout" case were in the .22 caliber range. Well, .22 caliber -- or 5.56mm, the chambering of the rifles the police were using.
The interpretation is that the police shot almost everyone. That's a stronger claim than I've heard from the ballistics so far, but one that has been corroborated by witness accounts. Of course, the witnesses were all arrested, and face felony terms just for being there -- even the ones who didn't have a gun or shoot a round, given that the prosecution has decided to prosecute this as an organized criminal 'association.'