Darryl Issa's committee has released a report on Lois Lerner's involvement in the IRS targeting of conservative 501(c)(4) organizations -- and to no one's surprise (at least for those who have been paying attention -- there is plenty of evidence that she was indeed involved in the scandal.
The report substantiates several damning conclusions:
(1) Lois Lerner was well aware of Senate Democrats' and some administration officials' wishes that the IRS crack down on applications from some tax-exempt organizations engaging in political activity (p. 23). She was concerned lest the IRS's work appear to be "per se political". (p. 9)
(2) Lerner created a lengthier approval process for certain (conservative) groups without informing them that they had been singled out (using inappropriate criteria like " criteria, which were used to including the phrases “Tea Party,” “Patriots,” or “9/12 Project” or“[s]tatements in the case file [that] criticize how the country is being run.” (pp 25-26). She later denied having done so when asked by Congressmen. (p. 5)
(3) "The Chief Counsel’s office also directed Lerner’s staff to request additional information from Tea Party applicants, including information about political activities leading up to the 2010 election. In fact, it appears the IRS never resolved the test applications." (p 30). Note that the Chief Counsel's office was run by William Wilkins -- the president's man at the IRS.
(4) Lerner was complicit in the effort to regulate 501(c)(4) groups "off plan" -- i.e., without any public notice. (p 31)
(5) After Steven Miller testified on Capitol Hill about charitable groups, Lerner expressed relief that the hearing turned out to be "less interesting than it might have." (p. 37)
(6) Lerner and her colleagues unnecessarily delayed the Inspector General's audit of the disparate treatment of different groups. (p. 39-40).
(7) Lerner used a private email to conduct official business, perhaps to thwart congressional oversight efforts (p. 46-47). Of course, she wouldn't be the first in this administration.