Another possibility: There may have been more to Rocco's story, but it got left on the cutting room floor.
We know from the deleted scenes that are included in the "extras" DVD and in the "Saga" version that FFC filmed many scenes that didn't make the final cut. I'm sure those scenes are just the smallest part of the total. Somewhere, someplace, perhaps there's a scene showing what Rocco did (or didn't do) during the Tahoe shooting. Perhaps there's a scene showing how the shooters were killed (and who killed them). And much, much more.
I'd give anything to see those scenes. But then there'd be less to post about here.