7: 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 profiling, DNA evidence, and firsthand accounts, we examine how systemic blind spots, ignored communities, and outdated assumptions allowed one of America’s most prolific serial killers to hide in plain sight. This is not a story about a monster.
It’s a story about what happens when the most vulnerable voices go unheard — and what we can learn from the Grim Sleeper case to prevent it from happening again.
UNMARKED: A true crime podcast built on real cases and never-before-heard audio.

Extended interviews, primary documents, and ad-free episodes are available inside UNMARKED: Case Files https://www.patreon.com/Unmarked_TrueCrimePodcast

Follow UNMARKED for additional case material, updates, and short-form analysis:
• YouTube: @Unmarked_Podcast
• Instagram: @unmarked_podcast
• TikTok: @unmarkedpodcast
• Patreon: /Unmarked_TrueCrimePodcast
For readers interested in primary-source work on the Manson case, see Buddy’s book, Charles Manson: The Last Words: https://www.amazon.com/dp/B0GQ6QRVQ7

UNMARKED: A True Crime Podcast is hosted by Audioboom.

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42: Charles Manson: James Buddy Day on WGN’s The Karen Conti Show

Before the release of Netflix’s Conversations with a Killer: The Charles Manson Tapes, I joined attorney Karen Conti on WGN Radio 720 in Chicago to discuss Charles Manson and what years of research in...

14 Elo 28min

41: The Manson Murders: Reconstructing the Sharon Tate Murders

What really happened inside 10050 Cielo Drive on the night of August 8, 1969?More than fifty years later, the Manson murders remain one of the most infamous crimes in American history. But beyond the ...

12 Elo 47min

38: The Green River Killer: Conversations with Gary Ridgway

What does one of America's most prolific serial killers say when he's spent more than two decades behind bars?For years, author Maria DiLorenzo has corresponded with Gary Ridgway—the Green River Kille...

5 Elo 58min

39: Did Bryan Kohberger Have an Accomplice? | Case Notes

In this episode of Case Notes, I'm joined by bestselling author and investigative journalist Howard Blum to discuss one of the most controversial theories to emerge from the Idaho murders investigatio...

2 Elo 21min

40: The Idaho Murders: A Psychological Autopsy of Bryan Kohberger

Why did the Idaho murders happen?Bryan Kohberger has pleaded guilty to the murders of four University of Idaho students. But his plea answered only one question: who committed the crime. It told us al...

29 Heinä 44min

36: The Fantasy Behind Serial Murder | Case Notes

What role does fantasy play in serial murder?In this episode of Case Notes, I sit down with bestselling investigative journalist and true crime author M. William Phelps to explore one of the most misu...

26 Heinä 22min

35: Robert Shulman: The Forgotten Long Island Serial Killer

Why did Long Island produce so many serial killers?From Richard Cottingham and Joel Rifkin to Robert Shulman and Rex Heuermann, Long Island has been home to one of the greatest concentrations of seria...

22 Heinä 52min

34: Defendants Have Tried to Kill Me — A Forensic Psychologist Explains the Job | Case Notes

What does it really take to become a forensic psychologist?In this episode of Case Notes, I sit down with Dr. N.G. Berill, a forensic psychologist with more than three decades of experience evaluating...

19 Heinä 33min