In this joint presentation, Mandiant, the FBI, and the U.S. Attorney's Office will present a case study on their successful collaboration to bring cybercriminal Jesse Kipf, aka Ghostmarket09, to justice. Mandiant identified Kipf attempting to sell access to state death registration systems and delivered a victim notification to the impacted States and provided evidence to the FBI, which opened an investigation. The talk will discuss how Mandiant supported the FBI's investigation and assisted federal prosecutors. In October 2023, Kipf was indicted on charges of computer fraud, identity theft, and bank fraud. In April 2024, Kipf pled guilty to computer fraud and identity theft for breaching death registration systems in multiple states. Speakers will share insights from this collaboration, discussing how cybersecurity vendors, law enforcement, and prosecutors can work together to identify, investigate and prosecute threat actors. They will highlight challenges of building a case and critical evidence needed for conviction.