The star witness at a hearing investigating the Internal Revenue Service’s targeting of conservative groups invoked her constitutional right to not answer questions.
By Richard Simon and Melanie Mason
May 22, 2013, 8:47 a.m.
WASHINGTON — A top Internal Revenue Service official invoked the 5th Amendment and declined to testify Wednesday before a House committee investigating the agency’s mishandling of applications by some conservative groups for tax-exempt status.













































