The usual strategy in these investigations is to get the little fish to roll on those higher up to build a case. Werwie is the most recent recipient of immunity out of three noted here, as many as eight if you count the Gardner/Walker improprieties, and is right there at the lectern with the Governor's seal on it. Dieck and Lucht, presumably, pointed investigators toward Werwie and Archer.
Cullen Werwie, spokesman for Walker, [snip] was granted immunity
"We don't know what exactly is involved," Walker told the Associated
Press on Friday [September 16], when asked at an unrelated event in Milwaukee. He also added: "Until we know, obviously it's a concern but again, I don't know any more details than what I've seen reported in the media outlets around the state."
How much higher can an investigation go?