Today’s case will leave you shocked at how dark family dynamics can turn. In November 2016, it was the weekend of Thanksgiving - a time for family, gratitude, and togetherness. But for Joel Guy Jr., it was anything but. What unfolded inside a Knoxville, Tennessee home was a gruesome crime that would forever stain the meaning of "family holiday." Joel Guy Jr., a 28-year-old who’d been financially supported by his parents his entire life, turned a visit to their home into a house of horrors. Motivated by greed and entitlement, Joel orchestrated a chilling plan to murder his parents, Lisa and Joel Sr., in an attempt to collect their life insurance money. But this wasn’t just a crime—it was a methodical, cold-blooded act of betrayal. A notebook filled with his meticulous, step-by-step plans was discovered, detailing every sinister move he intended to make. By the time the crime was uncovered, the brutality of the murder left investigators—and the nation—horrified.