The problem as I understand it is proving beyond a reasonable doubt that there was an explicit quid-pro-quo.
Well, murdering a Secretary of Commerce to keep the fact that the DNC and Clinton campaigns were taking Chinese communist money in exchange for rubber stamping requests from DNC contributors and the Chinese government to provide what had been restricted technologies is "technically" illegal. Question ... how will anyone prove the quid-pro-quo if there is no investigation? I've challenged you before to provide any examples of Bush/Ashcroft investigating ANY of the crimes the DNC and Clinton administration committed ... say, starting with the Riady Non-Refund. I'm still waiting.
I am confident that it is only a matter of time before they discover whether the refund was actually paid to the US Treasury.