Apple has expanded its investigation into OpenAI, a company founded by Elon Musk, after discovering that more former employees may have taken confidential data with them. The investigation, which initially focused on a single individual, has now widened to include additional former staff members who may have retained or accessed sensitive information. Apple has filed a new court document detailing its findings and outlining its concerns about the potential theft of trade secrets. The exact nature and extent of the alleged data theft remain unclear. This development highlights the importance of protecting sensitive information in the tech industry.