The David Kalac 4chan murder confession refers to a chilling event in November 2014 where David Kalac allegedly posted images of his deceased girlfriend, Amber Coplin, to the /b/ board before fleeing. The post included a disturbing confession and details about the crime, which circulated rapidly across the imageboard before being picked up by major news outlets. This incident is often cited as one of the most notorious examples of 'true crime' manifesting in real-time on anonymous forums, highlighting the platform's reputation for hosting unfiltered and often dark content. While not a 'meme' in the sense of humor, it remains a significant part of internet lore, frequently discussed in horror-themed documentaries and digital history forums as a cautionary tale of online anonymity and real-world violence.