Suspected Gilgo Beach serial killer Rex Heuermann has been charged with murdering a seventh victim.
Heuermann was indicted for the 2000 killing of Valerie Mack at a Long Island courthouse Tuesday morning.
Mack was a 24 year-old Philadelphia woman who vanished 24 years ago. Partial remains were found in Manorville, Long Island, in November that year.
Heuermann has been charged with Mack’s murder after her body was reexamined using the latest DNA analysis.
He was named as a suspect back in June after detailed notes about serial killings were discovered at his Massapequa home.
Heuerman, 61, was arrested in 2023 and charged with the murder of six women – at least four of whom were sex workers before their deaths.
He previously pleaded not guilty to the murders of Sandra Costilla, Jessica Taylor, Melissa Barthelemy, Amber Lynn Costello, Megan Waterman, Maureen Brainard-Barnes.
But prosecutors say they have tied him to the killings using cellphone site data and DNA.
Rex Heuermann, pictured in court in July, has now been charged with murdering a seventh victim, Valerie Mack
Valerie Mack disappeared in 2000 and parts of her body were discovered in Long Island that November
They also say that an alleged manifesto detailing how he carried out the slayings was discovered on a hard drive in his basement.
In the document, Heuermann allegedly laid out a set of tasks to complete before, during and after killings, including checking the weather and setting up a staging area. It also has a place to note practical lessons for ‘next time.’
One section, titled ‘BODY PREP,’ included guidance to ‘REMOVE HEAD AND HANDS,’ as well as tattoos and ‘marks of torture.’ Heuermann allegedly also left a reminder for himself to wash the ‘inside and all cavities’ of his victims.
Another section, ‘THINGS TO REMEMBER,’ appears to highlight lessons from previous killings that should be heeded, according to prosecutors.
The entries describe the importance of sleeping properly ‘BEFORE HUNT,’ using thick rope, and limiting noise to increase ‘PLAY TIME.’
In a section titled ‘POST EVENT,’ there were reminders such as ‘change tires,’ ‘burn gloves,’ ‘dispose of pics,’ and ‘have story set.’
In addition to the hard drive, prosecutors say they found a book in Heuermann’s possession by the retired FBI agent John Douglas, The Cases That Haunt Us.
They say the planning document also referenced specific pages in another work by Douglas, Mind Hunter, that allude to the personality types of serial killers and personality profiles of those who use mutilation and sexual violence.
Jessica Taylor vanished in 2003 while working as an escort in New York City. Some of her remains were discovered in Manorville that year.
Other remains were found in a 2011 search of the beach scrub by the side of Ocean Parkway, the road where the other Gilgo Beach victims were found.
She had been decapitated and both of her arms were severed. Moreover, a tattoo on her torso had been ‘severely obliterated by a sharp object,’ per officials.
Developing story, check back for updates…
