The way I see it is;
T-Jinyo say they want the truth but in all honesty they only want to hear T-ara admit that they did indeed bully, because if T-ara says otherwise- T-Jinyo will just look like a bunch of rabid dogs barking up the wrong tree (which they are).
Also, KKS already had a bad image; telling lies, giving vague answers, and making one horrible decision after another. His image/name was projected onto T-ara, they became the liars and whatnot. In the public eye CCM/KKS is T-ara and T-ara is CCM/KKS. You can't win when you have that kind of image projected onto you. These girl are in a poorly manage company, where the CEO lacks common sense/knowledge/humanity/professionalism/pr skills/etc.
Having some experience in PR, my first instinct would be to tell the artist/client to lay low so I could come up with a plan and patch up the wound. Which is most likely why the girls were quiet the entire time. Lay out the plans, have a press conference WITH the girls and clear the air all within the first day or two of the tweets/speculation. CCM either doesn't have a PR rep/dept., or they have a shitty one, or KKS is just ignorant in general (ding ding ding!) and went against the PR plan. They only made the situation worst by the way it was handle. So the girls not defending themselves or Hwayoung defending T-ara, its not as simple as black and white.
Hope this made sense I'm running low on fuel due to lack of sleep lol.