Lois Lerner, the IRS official who first disclosed the agency's improper targeting of conservative groups two weeks ago, will invoke her right not to testify Wednesday for fear of self-incrimination, her lawyer has told the House Oversight Committee.

1220845_image_1024w Andrew Harrer/Bloomberg

"The committee has been contacted by Ms. Lerner's lawyer who stated that his client intended to invoke her Fifth Amendment right and refuse to answer questions," said oversight spokesman Ali Ahmad.