Oh she was trying to lead him, and clearly it was mostly fantasy. Bella, for example, wasn't dead. Nor was Augustus or Rodolphus or most the people Barty saw dying in her mind. But oh, that was Goyle, yes, that was him, and well, it was difficult to tell really, but everything fit with how the body had been found, the condition, there was even some about chopping. But he wasn't the only one getting chopped up in her mind. It wasn't anything that held up in court. And the girl was a rabid dog, not in control of herself really. And bloody hell, Barty had no doubts, personally, that she had done it.
But hmm, Luna. He wanted to know about her. And Barty tried to grab any little bit that had to do with her. Her death. Anything.