I seems to me that the wording is important. "Holding onto", "held for 3-4 days". My guess is that we are being told that ABC did just that. If ABC had turned it over immediatly the wording would have been just "turned over to". IMHO I think we are being told something.
It would not have been billed as a "Controversy" if ABC had not held it. Our national security is at stake and they keep this from the Feds?