[topher]

There is a fourth person who wants to testify, but red tape (security clearance for the person's lawyer) is holding this.

However, it is unclear who this is (in terms of where they were at the time of the attack).

[GeorgeWashingtonsGhost]

Here name is Victoria Toensing. http://dailycaller.com/2013/05/08/fourth-benghazi-witness-gagged-by-red-tape/

She must have some incriminating info. to have been blocked from testifying. I think the leftist-radicals are afraid a woman testifying might get the attention of Obama's base; The 20-something bimbo female.