Well, now, that gets rather interesting. It appears that Pansy and Harry were quite involved and manged to do a lot, though those who tried to use them paid for the mis-deeds. I do like the Harry's attitude here, he's not seeking an absolution, he's simply telling it the way it really is.
'Twill be quite interesting to see how the trial goes and to see how the Weasleys take it when they find out that Harry knew of their efforts to control him and that that was what secured Ginny's fate. I suspect there's going to be considerable ill-feeling toward Harry, notwithstanding that he did defeat Tom.