The Fall of the House of Usher: What crime did Roderick and Dupin plan to expose in court?

In the seventh episode of The Fall of the House of Usher, titled "The Pit and the Pendulum," Roderick and Dupin plan to expose a crime in court. The crime they aim to unveil is the forgery of Roderick's signature on clinical trial documents by Fortunato Pharmaceuticals. These papers are vital as they ensure patients are fully informed about the trials they are participating in. Roderick and Dupin collaborate to gather confidential documents from Fortunato's archives that prove the company's malfeasance. With these documents, they plan to testify in court and reveal the forged signatures.However, Roderick shocks everyone when he takes the stand and claims that he signed all the papers himself. He even goes further to accuse Dupin of harassing him into lying about the signatures. This turn of events results in Roderick's arrest for perjury and puts an end to Dupin's career, at least temporarily. This betrayal deeply affects Annabel, Roderick's wife, who had believed her husband would do the right thing. Madeline, Roderick's sister, tries to console Annabel by highlighting the potential promotions and success Roderick may achieve by becoming Fortunato's important employee. However, Annabel only wanted her husband to uphold his principles.In the 2020s, Madeline continues her pursuit of power within Fortunato by attempting to secure votes to oust Roderick as CEO. She meets with Arthur Pym in secret and proposes a shift towards artificial intelligence to improve the company's image. However, Madeline is haunted by the recent deaths of Tamerlane and her encounter with Verna, a woman responsible for the destruction of her family. Seeking answers, Madeline returns to her childhood home and finds Verna there. It is revealed that Madeline and Roderick have made a pact with Verna, though the details are not fully disclosed. However, the agreement appears to involve fulfilling the terms through someone's death.Madeline tries to renegotiate the agreement with Verna and even attempts to kill her. However, Verna proves to be unkillable. The specific meaning of the pact and its terms remain unclear until the next episode. Madeline leaves her brother Roderick behind, believing that his only option is to take a Ligodone overdose and end his life. However, Verna revives Roderick after Madeline's departure, ensuring he does not escape his fate so easily.Meanwhile, Frederick, another Usher sibling, seeks to become the new CEO of Fortunato. To solidify his position, he decides to demolish Prospero's lab. However, he continues tormenting his wife Morelle by subjecting her to paralyzing drugs and disfiguring her. Verna, witnessing Frederick's cruelty, whispers something to him that leads him to add the paralyzer to his cocaine stash. As Frederick arrives at the demolition site, he succumbs to his own drug-induced paralysis. Verna appears once again, berating him for his choices, and remotely gives the demolition crew permission to proceed. A swinging beam splits Frederick's body in half, marking the end of the Usher children.Despite this, the Usher dynasty is not entirely eradicated as Lenore, Roderick's granddaughter, remains alive. However, there are hints that Lenore, under Madeline's influence and involvement in an AI project, may have undergone a transformation that surpasses human or even living boundaries. The exact nature of this transformation is yet to be revealed, but it lends an air of uncertainty to the future of the Usher bloodline.