...pray tell, which indictment that we've already seen did he help with?
...the target Flynn helped with is a far bigger target than he is (which would make sense anyway).
1) Mueller makes clear that he *specifically* would be fine with Flynn being sentenced now despite him being slated to testify at a July trial, so there's no fuzz on that issue.
2) While Flynn assisted in the Rafiekian case, that *couldn't* be what got him a deal.