There a Serino or Seriano, or something like that affidavit, that disagrees with the decision to not at least hold, and maybe to charge Zimmerman. This is separate from the "what pigeonhole is this investigation in" entry on the initial investigation forms.
It looks like “sources” told ABC News that the lead investigator, Chris Serino, “didn’t believe the story” and that he wanted Zimmerman charged. Do you know if we have anything more concrete than the ABC News article with anonymous sources? I have been unable to find anything, and I tend to doubt the veracity of their claim.