The Fall of the House of Usher: How did Verna kill Camille?

In the lab, Camille decides to investigate Victorine's experiments with the chimps at RUE. Unbeknownst to her, Verna, disguised as a security guard, intercepts her and warns her not to go in. Verna, who has been making her way into the lives of the Usher siblings, tries to offer Camille a way out, just as she did with Prospero. However, Camille ignores the warning and enters the room where Victorine keeps the highly excitable, stitched-up chimps.As Camille begins taking pictures of the disturbing scene, Verna suddenly strikes up a conversation about animal testing. Eventually, she jumps onto the surgery table in the middle of the room and reveals her own stitched-up chest to Camille. Shocked, Camille quickly takes a picture with her phone. However, as soon as the flash goes off, Verna transforms into an enraged ape and attacks Camille. The next morning, the lab is covered in blood, and Camille's mangled body lies in the corner with a chimp nearby.Meanwhile, the Usher family is dealing with the aftermath of Prospero's death. They spin a narrative about Prospero being a charitable genius, using his demise as fuel to further their own agendas. Roderick blames Frederick for not demolishing the condemned building where Prospero threw his party, while Leo continues his drug-infused celebrations, which end in tragic consequences. The family takes a utilitarian approach to grief, using death to their advantage.Verna, slowly infiltrating the lives of the Usher siblings, presents herself as a test subject for Victorine's heart mesh experiment. She also replaces the woman involved in Tamerlane and William's complex fetish games. Camille, suspicious of Victorine, investigates the animal trials at RUE Morgue with the help of her assistants, Toby and Tina. They find evidence that Victorine has been falsifying test results, killing off monkeys and deceiving with stitched-up and adrenaline-pumped replacements.Camille is thrilled to uncover this information about her sister but is caught off guard when Toby and Tina reveal that they are now in a romantic relationship and will no longer participate in the sexual aspects of their professional relationship. Camille fires them, leaving herself to deal with the Victorine investigation alone.In the end, Camille confronts Verna in the lab, leading to a terrifying and violent encounter. The details of the aftermath are unclear, but it is evident that Verna transforms into an ape-like creature and attacks Camille, resulting in Camille's gruesome death.