E7 - The Grim Sleeper: A Serial Killer Hidden in Plain Sight

For decades, the Grim Sleeper terrorized South Los Angeles — killing women in neighborhoods he knew by heart, often within miles of his own home. Lonnie Franklin Jr. wasn’t a criminal mastermind or a drifter moving between states. He was a neighbor. A city worker. A man who lived quietly beneath the LAX flight path while violence unfolded around him. In this episode of UNMARKED, we break down how Franklin was able to operate for nearly thirty years without being caught — and why traditional serial-killer profiling failed to see what was happening right in front of investigators. Using geographic profil...