More Info -- Federal Judge Shuts Down Secret "John Doe" Investigations of Scott Walker and Right-Leaning Groups

From Ace of Spades HQ:

As I understand it, the main complaint was that prosecutorial resources were being warped for partisan purposes.

As Wisconsin Reporter first revealed, the investigation, launched in early 2012 by the Democrat-led Milwaukee County District Attorney’s office, aims to prove conservatives illegally coordinated activities in the historic recalls of Gov. Scott Walker and Republican state senators, multiple sources say. One source with knowledge of the investigation has told Wisconsin Reporter the ultimate goal is to bring down Walker, the bane of Wisconsin liberals.
Conservative targets and others close to Wisconsin’s latest politically charged John Doe contend the probe is nothing more than a “taxpayer-funded, opposition-research campaign.”
“This is not a question of what conservatives did wrong. It’s a question of one party in this state using prosecutorial powers to conduct a one-sided investigation into conservatives,” said one source who spoke on condition of anonymity due to his proximity to the probe.
What is striking is that no liberal organizations appear to be targeted in the John Doe, particularly interesting in light of the tens of millions of dollars pumped into Wisconsin’s unprecedented spate of recalls in 2011 and 2012 by union and left-leaning groups.

And it should be noted that these prosecutors were searching for evidence in their probe. One can then wonder why they didn't also think of searching for evidence of illegal coordination among Walker's opponents

This entire investigation was being driven to scare off conservative groups. Make their legal bills so expensive that they quit. Similar to what the Prop 8 opponents have done in California. If you supported Prop. 8, you will be exposed, vilified, or forced to resign.