Heuermann pleaded not accountable on Tuesday to Mack’s murder in Suffolk County court docket docket.

The associated fee comes after Heuermann was initially arrested in 2023 and charged with the murders of Amber Lynn Costello, Melissa Barthelemy, and Megan Waterman. Earlier this yr, he was moreover charged with the murders of Maureen Brainard-Barnes, Jessica Taylor and Sandra Costilla.

He was linked to Mack’s murder by forensic proof — along with a hair near her physique allegedly matching the DNA of his partner and daughter. Per prosecutors, the fashion of Mack’s lack of life and dismemberment moreover matched a “planning doc” found on Heuermann’s models.

A superseding indictment launched Tuesday offers further notion into the persevering with investigation and its findings — along with the invention of what prosecutors identify “mementos” and “souvenirs” at Heuermann’s home and office following a search.

Inside a cardboard area in his Manhattan office, Gilgo Homicide Course of Drive brokers found a PEOPLE journal from November 7, 2016 with the headline “‘BODIES ON THE BEACH: HUNT FOR THE LONG ISLAND SERIAL KILLER: Who’s the cold-blooded murderer killing ladies and dumping their our our bodies on a New York Seashore?” on the cover.

In his home, moreover they discovered a New York journal from 2011 with a “Serial Killer on Prolonged Island” cowl story.

Whereas these two clippings had been every current in 2023, a May 2024 search of his home turned up newspapers inside his main mattress room — along with a New York Put up with an article entitled, “Serial Killer Eyed in L.I. Slay.” The article, per prosecutors, included particulars on every Mack and Taylor’s disappearances.

Papers throughout the basement, within the meantime, included a 1993 article entitled “Physique Present in Woods,” which referenced Costilla’s homicide investigation. The entire papers had been believed to have been store-bought and by no means subscriptions.

“Based on the totality of the investigation, the Course of Drive believes Rex A. Heuermann sought, purchased, and saved these publications as, inter alia, ‘souvenirs’ or ‘mementos’ of his crimes, serving as a reminder of the events that occurred all by the murders of each sufferer,” well-known prosecutors throughout the docs.

Stays had been first present in November 2000, when hunters bought right here all through a plastic bag wrapped with duct tape. Contained within the bag, police discovered a torso, legs and arms; the sufferer’s head and fingers had been severed from her physique, whereas her correct leg had moreover been scale back off mid-calf.

She grew to develop into typically referred to as Jane Doe #6; her head, fingers and correct foot weren’t found for 11 years. In 2020, using DNA samples from her stays, she was acknowledged as Mack, who authorities contemplate was a intercourse worker in every Philadelphia, Pennsylvania and Atlantic Metropolis, New Jersey.

Per the docs, she was moreover “recognized to ‘highway stroll,’ i.e., wander the streets looking for intercourse work.”

The Suffolk County Medical Examiner’s Office later determined she was killed between September 1, 2000 and November 19, 2000. The Medical Examiner’s Office moreover discovered accidents to the sufferer’s breast, which the docs observe had been “seemingly the outcomes of post-mortem mutilation of the sufferer’s breast with a sharp object.”

By way of the examination, a human hair was moreover discovered by the victims left wrist, contained within the sealed garbage baggage.

The hair allegedly bought right here up as a match for every Asa Ellerup and Victoria Heuermann, Heuermann’s partner and daughter. Additional forensic testing moreover allegedly confirmed the hair “is significantly further vulnerable to have derived from a person genetically just like Victoria Heuermann’s DNA profile, thereby linking proof from yet another crime scene to the Defendant by means of his on the spot family.”

Victoria would have been between 3 and 4-years-old on the time.

Throughout the docs, prosecutors reiterated among the many findings after executing search warrants on Heuermann’s digital models — this time linking them to Mack’s murder as successfully.

“As beforehand detailed, an analysis of these models has revealed Heuermann’s very important assortment of violent, bondage, and torture pornography, in the mean time relationship once more to 1994,” they wrote. “Moreover, throughout the months major as a lot as Ms. Mack’s disappearance and murder, the Course of Drive uncovered pornographic photos accessed by Heuermann which embody, breast mutilation, and the tying up of women with rope, which largely coincide with a.) the accidents inflicted on Ms. Mack’s breast and b.) how the rope ligatures had been utilized on Valerie Mack.”

Moreover they well-known that by the month of September 2000, “investigators observed a giant uptick in downloads of pornographic photos depicting Bondage, Self-discipline, Sadism, and Masochism.”

See how his lawyer beforehand defended Heuermann’s internet train proper right here.

Prosecutors later recognized elevated internet makes use of of GilgoNews.com, which adopted the murder investigation, throughout the days major as a lot as Mack’s id being revealed in 2020.

The docs moreover resurfaced particulars from a Phrase Doc investigators contemplate “to be a ‘planning doc’ utilized by Heuermann to methodically blueprint and ‘plan out’ his “kills.” Prosecutors recognized that the distinctive doc “appears to have been created throughout the yr 2000, which notably coincides with the yr Valerie Mack was murdered.”

Investigators contemplate the “planning” doc “substantively pertains to the Mack investigation in several respects,” stating how they contemplate it advises for “small” victims and utilizing dump web sites, “ROPE/CORD,” “BAGS/TAPE” and “SAW/CUTTING TOOLS.” The doc moreover suggests to “REMOVE HEAD AND HANDS” AND “REMOVE ID MARKS [TATTOOS…”

Mack, in line with the Gilgo Murder Process Drive’s investigation, allegedly had a tattoo of her son’s title on her foot/ankle.

“The examination of the sufferer’s physique in 2000 revealed no tattoos on the sufferer’s left foot/ankle,” they wrote. “Primarily based on the foregoing, the Gilgo Murder Process Drive members consider the Defendant amputated Ms. Mack’s decrease proper leg on the mid-calf to inhibit and/or delay the identification of Ms. Mack’s tattoo and subsequently, Ms. Mack.”

Summing up the case, prosecutors wrote:

Primarily based on the foregoing, Rex A. Heuermann is now charged with the murders of seven victims. Of observe, two impartial laboratories have forensically linked proof from six of seven crime scenes to Defendant Heuermann and/or members of his instant household, or people with whom Heuermann resided.

Second, the HK Planning Doc’s creation in 2000, the identical yr Valerie Mack was murdered, in addition to its description of DS-1, or the primary “dump web site” as Mill Street, which is the place the stays of Ms. Mack had been found, additional emphasizes the doc’s relevance to the Valerie Mack murder investigation.

Moreover, the dismemberment of Ms. Mack’s proper leg, the place she had a tattoo of her son’s title, was clearly supposed to inhibit the identification of Ms. Mack, which is corroborated by the HK Planning Doc, its presence on Heuermann’s laptop computer pc, and the mutilation of Jessica Taylor’s tattoo similarly.

Lastly, the Gilgo Murder Process Drive members consider that Rex A. Heuermann’s possession of quite a few publications referring to not solely the “Gilgo 4,” but additionally Sandra Costilla, Valerie Mack, and Jessica Taylor, signifies the Defendant’’ makes an attempt to remind himself of the occasions that occurred all through the murders of every sufferer, revealing Rex A. Heuermann’s utter lack of disregard or regret for his actions, or the victims.