Whatever Happened to the McKinney Assault Case?

RealClearPolitics follows up on the case of Rep. Cynthia McKinney who allegedly assaulted a Capitol Hill police officer three months ago, and as yet still hasn't been charged or cleared:

The grand jury investigation of 4th District Congresswoman Cynthia McKinney enters its third month today with no hint from the federal prosecutor about how much longer it will take to settle a case that legal experts said should have been wrapped up in a matter of days. [snip]

"Right from the start this U.S. attorney has handled this case differently from every other case," said Chuck Canterbury, national president of the Fraternal Order of Police. "And it's because she is a sitting congresswoman." [snip]

What most angers the police about the McKinney case is that it involves an assault -- no matter how minor -- of a police officer. [snip]

In legal terms, McKinney's case "is as simple as you can get," said George Washington University legal expert Jonathan Turley. Usually anyone who hits a police officer is immediately arrested on felony charges, police and legal experts said.

This must be completly infuriating for the Capitol Hill police who probably feel that congressmen can assault them at will and walk away untouched. Had I tried something like that when I visited Capitol Hill last summer, I would have been in jail long ago.

UPDATE: No charges.