User blog comment:Dengarde/Case West: Scheduled for release in mid December/@comment-2059511-20101130181657/@comment-1992121-20101201131248

I'm pretty sure they were gonna make his hurt leg a minor plot point in DR, but didn't have time so they cut it and left his animation how it was. For example, look at how Frank runs when he answers Otis' calls. He doesn't limp because they changed that animation but didn't have time for his regular one. At least that's MY theory, and it's just a theory. But it seems plausible.