Some of them aren't just bounty hunters. Some are certified and licensed as PI's in the state of California. If they are granted reciprocity in Florida and they are working for Casey/Jose, I think their information goes to Jose first and foremost. Jose under client/attorney privilege doesn't have to disclose it. Thus far, there's not a sign of a GJ - anything they find they do not have to disclose until GJ: they don't have to offer it up to anybody. A prosecutor would have to ask them the appropriate specific questions on the stand, I think, to get those answers.
Given what happened in the Drew Peterson case and that GJ, I don't have much faith.