David Lu, a Chinese software developer, has been sentenced to four years in prison in the US for executing cyberattacks on his former employer, Eaton Corporation, after his responsibilities were reduced. He introduced malicious code that caused server disruptions and blocked user access, resulting in over $360,000 in damages. Lu’s actions included creating a kill switch to lock out users post-termination and deleting colleagues’ profile settings. Despite his conviction, Lu maintains his innocence and is exploring appeal options. This case highlights significant cybersecurity risks posed by insider threats, underscoring the need for robust defensive measures in organizations, especially in sectors reliant on sensitive technology.