Disturbing Notes Gilgo Killer Rex Heuermann Kept About Alleged Murders

Accused Gilgo Beach serial killer Rex Heuermann kept a stomach-churning “planning document” outlining his grisly murders – which even included a chilling section on “things to remember” and a morbid section on “lessons learned,” officials revealed.

An “allocated space” computer file that Heuermann allegedly tried to delete laid out a gruesome road map for the heinous murders of six sex workers dating back to 1993 – including the decapitation and dismemberment of two murders newly linked to the imposing father of Long Island, in Suffolk County. prosecutors said Thursday.

In a disturbing note, Heuermann allegedly indicated he planned to continue killing, prosecutors said.

“Members of the GIlgo Homicide Task Force believe these references to 'next time' indicate Heuermann's prior experience and changes to be implemented in the future,” the prosecutor's filing states.

The revelation came as the prosecutor's office slapped Heuermann with new charges in the 2003 murder and dismemberment of Sandra Costilla and Jessica Taylor in 1993 – on top of the ongoing criminal charges he had already faced in the deaths women known as the “Gilgo Four”. »

According to a bail request filed Thursday by prosecutors, Heuermann kept a secret digital recording titled “HK2002-2004” on his computer since at least 2000, keeping detailed notes about the murders.

The digital document was divided into specific sections such as “issues,” “supplies” and “TGR,” which prosecutors said were potential targets, and “DS,” allegedly intended for “dump sites.”

The practice brief states that “small is good” for potential victims and includes a three-part section for “pre-preparation,” “preparation” and “post-event,” the Suffolk district attorney's court document states.

“Hong Kong’s planning document continues to detail preparatory measures such as specific ‘reconnaissance’ measures taken,” including “packing (a body) for transport,” prosecutors said.

One section mentions “removing head and hands,” which the prosecutor's office says matches the remains of Taylor and another body of Gilgo, Valerie Mack, who has not been officially linked to Heuermann.

There is also a section reminding the accused killer to “remove the identification marks (tattoos) (sic)”, which is consistent with Taylor's remains, which showed “linear wounds”, particularly “around the where Ms. Taylor's tattoo had been located, which investigators discovered. “I believe it was intended to prevent identification” of the victim.

Finally, Heuermann allegedly kept a “things to remember” section, which detailed twisted reminders such as “strike harder” for “next time” and use a heavier rope because “the light rope broke (stress of 'to be tense).

“Hit harder, there are too many strikes to eliminate,” the planning document states, according to prosecutors.

“Consider hitting the face or neck next time to remove it. »

Additionally, Heuermann opines on the importance of sleep to avoid “trouble” and increase what he calls “play time,” prosecutors said.

Also in this section are notes stating “pushing thumbtacks to hang clothes from the ceiling” and “no duct tape”, as well as notes about “sound travel” – indicating a preference for committing crimes at home. interior, said the prosecutor.

According to prosecutors, the Hong Kong case “reveals Heuermann's self-education and 'homework.'

Heuermann, a 60-year-old architect from Massapequa Park with offices in Midtown Manhattan, is now accused of murdering a half-dozen sex workers over the past three decades.

The murders of the victims — Taylor, 20; Megan Waterman, 22; Mélissa Barthélemy, 24 years old; Maureen Brainard-Barnes, 25; Amber Lynn Costello, 27; and Costilla, 28 — remained unsolved for decades until the murders were reopened in 2022 and left for Heuermann's arrest in July.

Costilla, who disappeared in 1993, had not previously been linked to the other bodies discovered along Ocean Parkway, where six other bodies were found and remain unsolved.

Costilla was initially thought to be related to convicted serial killer John Bittrolff, but documents filed Thursday by prosecutors indicated her DNA did not match that of him.