"I see no reason that the FBI can't investigate the IRS scandal"

You would be a Racist, Obamaphobe, Teabagger if you you think that the FBI can't properly and thoroughly investigate the IRS.......(Note heavy sarcasm)
 The FBI has not questioned 1 victim yet............
There is no evidence that the FBI has contacted a single tea party group in its criminal investigation of the Internal Revenue Service, according to the groups the IRS abused. “We have not been contacted by any federal investigative agency and, to date, none of our clients have been contacted or interviewed by the FBI,” Jay Sekulow of the American Center for Law and Justice told The Daily Caller on Thursday. The ACLJ has filed suit against the IRS on behalf of 25 conservative groups, with additional groups being added in the next couple weeks, according to a spokesman. “I have been very surprised that I have not heard from anybody and frankly, none of my clients have. I talk to other tea party leaders on a regular basis,” said Cleta Mitchell, the lawyer largely credited with pushing the IRS abuses to the forefront. Read more here

And how about all the "I don't know's" from the head of the FBI?

Rep. Jim Jordan DESTROYS FBI Director Mueller on IRS Targeting Scandal