Learn About 2 Of California's Deadliest Murders In 'Manifesto Of A Serial Killer'

Oxygen True Crime is starting the new year with more compelling series and specials, including a three-part special, which dives into how the vanishing of a man named Paul Cosner intersects with one of the deadliest murderers in California history, and a show about the most jaw-dropping homicide cases in the Florida-Alabama area.

"Manifesto of a Serial Killer” premieres Sunday, January 1 at 7/6c, and “Floribama Murders” premieres Saturday, January 7 at 9/8c on Oxygen True Crime.

Here's what to know about each one:

"Manifesto Of A Serial Killer"

When a documentary filmmaker sets out to tell the story of one of the biggest serial killer cases in California history, he uncovers a terrifying tale that begins in 1984 with the disappearance of San Francisco resident Paul Cosner. As investigators search for Cosner, they discover Leonard Lake’s cabin, where among buried human remains they find Lake’s recorded manifesto. When Lake’s accomplice, Charles Ng, flees the country, a manhunt ensues and the fight for justice begins. 

All three parts of the special air back to back Sunday, January 1 starting at 7/6c on Oxygen True Crime.

Part 1 – “The Disappearance of Paul Cosner” 

When a documentary filmmaker sets out to tell the story of one of the biggest serial killer cases in California history, he uncovers a terrifying tale that begins with the disappearance of Paul Cosner.

Part 2 – “Operation Miranda”

With the discovery of Leonard Lake’s cabin, investigators find the hidden cell where Lake kept his victims and begin to dig up human remains. They also unearth Lake’s recorded manifesto, which details his depraved plans for “Operation Miranda.”

Part 3 – “The Hunt for Charles Ng”

When Lake’s accomplice, Charles Ng, flees the country, an international manhunt ensues. The victims’ families, including Paul Cosner’s sister, Sharon Sellitto, fight to bring Ng to justice and answer for the crimes he committed with Leonard Lake.

“Manifesto of a Serial Killer” is produced by Bungalow Media + Entertainment LLC with Robert Friedman, Matthew Testa, Lauren Moore Morden, Todd Howe and Mike Powers serving as Executive Producers.

"Floribama Murders"

Your First Look at the New Series Floribama Murders

“Floribama Murders,” series premiere from Blumhouse Television focuses on the hidden dangers and some of the strangest killers ever investigated in the region around the Florida-Alabama border, affectionately known as “Floribama.” This series examines bizarre homicide cases that could only come out of this unique place. “Floribama” premieres on Saturday, January 7 at 9/8c on Oxygen True Crime.

Upcoming episodes include:

“Jackson County Injustice” (Jan. 7)

Investigators from three separate counties along the Floribama border team up with the daughter of a missing Jackson County, Florida, man to uncover how the fireworks at a 4th of July celebration ended in murder.

“Clay County Killer” (Jan. 14)

The owners of an Alabama country store are brutally murdered in their home, and detectives must sort through a maze of bootlegging, gambling and family secrets to uncover the killer.

RELATED: ‘I Just Choked Him’: ‘Killer Babysitter’ Left A Trail Of Death In Florida

“Hidden in Chunchula (Jan. 21)

After Hurricane Ivan tears through the Floribama region, the discovery of a body in a burnt-out home in Chunchula, Alabama, launches an investigation that reveals an unexpected evil in the community.

“Targeted in Beulah” (Jan. 28)

In tiny Beulah, Florida, security video from the home of a couple known for taking in special needs children contains clues investigators must decipher to learn who targeted the parents for murder and executed them in front of their eight kids.

“Floribama Murders” is produced by Blumhouse Television and Man vs Robot with Jason Blum, Chris McCumber, Jeremy Gold, Mary Lisio and James Buddy Day serving as executive producers for Blumhouse Television and Danny Villa and Sergio Villa serving as executive producers for Man vs Robot. Steve Katz also serving as executive producer.