D.C. Council’s formal investigation into the largest corruption scandal incity government history will focus on the current case of unprecedented fraud in the tax office, the council chairman said, and the panel might call on former Mayor Anthony Williams to testify.

“There’s some pretty fundamental deficiencies here that have got to be addressed that a criminal investigation would never address,” Council Chairman Vincent Gray told The Examiner on Wednesday. “If we start this off with such a wide scope to take on the entire city, we may get nothing done at the end of the day.”