A parallel legal universe, open only to corporations and largely invisible to everyone else, helps executives convicted of crimes escape punishment. In a four part series, BuzzFeed investigates investor-state dispute settlements, or ISDS, a process for settling disputes between corporations and governments. The rules for settling investor-state disputes are written into a network of treaties that govern international trade and investment, including NAFTA and the Trans-Pacific Partnership, which Congress must soon decide whether to ratify.