Condrey is still awaiting sentencing after 2.5 years. Can mean only one thing; he's cooperating with the feds.
The Uranium associated investigations under Obama's DOJ were dead for 1.5 of those years he was awaiting sentencing. So I don't think that Condrey cooperating with the feds is the reason unless it is to help cover things up.
Beyond that, it's more likely that acting AG Rosenstein knows more about the government side of the associated Uranium scandals than does Condrey. Beyond even that, if Condrey actually did know things about the government side of the associated Uranium scandals, he would actually be putting Rosenstein, his buddy Mueller and all of their cohorts, Holder, Hillary, Obama... in jeopardy.