Harry had said his piece, for the most part. He didn't entirely understand everything that was going on here, but it was becoming increasingly obvious that there was nothing he could say that would get through. Zach didn't have all the details, but Harry didn't feel like wasting his breath explaining them all. He hadn't even explained everything to the Minister of Magic, why would he do as much for someone whose opinion of him was even lower?
And anything he might have said left his mind at this new accusation, anyway. Cedric - he'd known, or guessed, that Zach had been talking about Cedric, in that angry note he'd written while Harry was still in hiding.
This wasn't about the war, anymore, about the fact that Harry had hidden and survived while others died, had battled alongside others who had died before Voldemort had fallen. The people who had fought in the battle had made their choice to be there; and there had been nothing, absolutely nothing more that Harry could have done to save the others, the ones Crouch had targeted just to torment him.
No. Harry had told Cedric to take the trophy with him, when Cedric would have ceded it to him. It didn't matter that in the moment, Harry had thought it should rightfully be Cedric's, that taking it together had seemed like the right thing to do. He had known all along that the Tournament was probably being orchestrated by someone who wanted him dead. He should have known.
The anger, the fight went out of him, like wind out of sails. He stared at Zach, reliving the horror he'd felt at the jerk behind his navel, at landing in the graveyard. Remembering Voldemort's words, and the curse. Kill the spare.
"I know," he said, voice breaking under the strain of it. Not just Cedric's death, but all of them, he felt them all, weighing him down, making his eyes sting. The rest of what he wanted to say got stuck in his throat, so he cleared it. "He'd gotten to the trophy first, and he wanted to just give it to me, because I'd saved him. If I'd just taken it-" he cut himself off. "I couldn't have done anything differently. There was no way I could have known, but I blame myself anyway. I didn't need you to tell me that. I know."