What does the reader learn was key to the jury being swayed to finding an innocent by reason of insanity verdict?

Central to the jury finding an innocent by reason of insanity verdict was the lack of fear of retaliation if they found Carl Lee guilty, despite the demonstrating by the former, and the threats by the latter. Rather, it came down to what would have taken place had they been in Carl Lee's shoes, had their daughter been attacked and suffered the same emotional and physical harm Tonya had.