Where's Trayvon's Voice Sample?

    One of the major controversies in the Zimmerman case is the cries for help which can be heard in the background of witness 11's call to 911 for forty seconds. Mr Zimmerman has provided several voice samples for the FBI to compare to the recording. As far back as March Daryl Parks of the scheme team has been promising to provide a known voice sample of Trayvon for comparison. As of this writing, the scheme team has still failed to provide a known voice sample of Trayvon Martin. The question is why?