Of Scott Walker spokesman Cullen Werwie, railroad lobbyist Ken Lucht, and local Republican Party functionary Roseann Dieck:
"Normally, the two kinds of people they're going to call for a John Doe investigation are, one, somebody they think is implicated and may testify under immunity, or, two, somebody that they're not really certain is implicated but might have information. It's kind of like, ‘If you didn't do anything wrong, why do you need immunity?' It may not be like that, but it sure looks like that."The three were granted immunity in exchange for something.
By the way, where is erstwhile Walker dissembler Jill Bader in all of this?*
* eta: "Safe and sound in Iceland," apparently.