If they announced 2 weeks ago then they would be accused of trying to influence the election.
Everyone should be for this investigation and speaking up why the others are not being investigated. What we don't want this to be is a "but officer", do we?
Sorry, but "but officer" sometimes is a fair question. The entire black lives matter movement is essentially asking "but officer."
If you want to say that every American death at the hands of a foreign government should be investigated, fine. But if you only say it when one country does it, then "but officer" is more than a fair question.