September 22, 1998, Vladimir Pokhilko, who was involved with the development of TETRIS, was found dead alongside his wife and their young son in their Palo Alto, California, home. Now, more than two decades later, the Palo Alto Police Department homicide investigators who were first on the scene revisit the haunting crime. What was once thought to be a murder-suicide in 1998 is now revealed to be something much more sinister.