Rex: The Gilgo Beach Architect | The Rex Heuermann Investigation
Rex Heuermann murdered eight women on Long Island between 1993 and 2010 while working as a Manhattan architect for companies like American Airlines, Target, and Nike. The investigation that should have caught him was obstructed by the very officials running it, with three Suffolk County law enforcement officials eventually going to federal prison for corruption that kept the FBI locked out of the case for years.
This series reconstructs the entire Gilgo Beach case from court filings, cell tower records, DNA evidence, witness testimony, and the public record. Every claim is sourced and cited on NBN.fm.
A 25-episode investigative series from the Neural Broadcast Network.
Rex: The Gilgo Beach Architect | The Rex Heuermann Investigation
Sandra Costilla: The First Victim Nobody Knew About
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Sandra Costilla was 28, from Trinidad and Tobago, and the mother of a 5 year old son when she was strangled in November 1993. She is the earliest known victim, killed three decades before DNA connected her to the architect from Massapequa Park.
All sources cited in this episode are available at https://nbn.fm/rex-the-gilgo-beach-architect/episode/ep3.
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NBN is a technology-first media company engineering global IP from the public record. Court filings, forensic evidence, government documents, and primary source journalism, produced through AI-native workflows that let the record speak for itself.
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November 1993. No Craigslist. No burner phones. No digital trail. A twenty-eight-year-old woman from Trinidad and Tobago is strangled and left in a wooded area in Southampton. For 30 years, investigators suspected the wrong man.
SPEAKER_01I mean, you have to wonder, how did a killer target victims before the internet?
SPEAKER_00Right. And how did it take three decades and advanced DNA to connect Sandra Costilla to the architect from Mass Piqua Park?
SPEAKER_01It's a huge question.
SPEAKER_00This is Rex, the Gilgo Beach architect. Every document and source is available on the Neural Broadcast Network website.
SPEAKER_01Yeah, we have everything posted there for you.
SPEAKER_00So let's jump to November 19th, 1993, North Sea, town of Southampton.
SPEAKER_01Right. So if you look at a map of Suffolk County, um, the first thing you notice about North Sea is the sheer distance from the Ocean Parkway corridor.
SPEAKER_00Yeah, it's really far out.
SPEAKER_01Exactly. You are looking at a geographic separation of roughly 60 miles from the dense coastal brush of Gilgo Beach.
SPEAKER_00Which is a long drive, especially back then.
SPEAKER_01Right. North Sea is this small hamlet on the South Fork of Long Island. And, you know, this is a crucial data point for your understanding of the offender's geographic comfort zone.
SPEAKER_00Because we are not dealing with the familiar beachside dumping ground here.
SPEAKER_01No, not at all. The location is Fish Cove Road. It's a deeply wooded, highly rural, and just heavily obscured setting.
SPEAKER_00So between November 19 and November 20, hunters walking through those specific woods off Fish Cove Road discovered human remains. Yeah. And when investigators arrived, the forensic timeline established that the remains were approximately one week old at the time of discovery. Trevor Burrus, Jr.
SPEAKER_01Right. So that places the actual time of death roughly around the second week of November 1993.
SPEAKER_00Exactly. And the medical examiner identified the victim as Sandra Castilla, a 28-year-old woman. They definitively ruled her cause of death as strangulation.
SPEAKER_01Which is significant. I mean, strangulation is a method of homicide that requires extreme physical proximity.
SPEAKER_00It's very hands-on.
SPEAKER_01Very. It demands that the offender overpower the victim and maintain sustained intense pressure for a prolonged period. It is a highly localized application of lethal force.
SPEAKER_00But um when you review the autopsy findings for Sandra Costa Ia, there's a secondary forensic detail that completely alters the profile of the perpetrator.
SPEAKER_01Right.
SPEAKER_00She suffered 25 distinct sharp force injuries.
SPEAKER_01Aaron Powell 25.
SPEAKER_00Yeah, 25. And forensic pathology indicates these specific injuries were post-mortem. Like they were inflicted after the strangulation had already resulted in death.
SPEAKER_01Wait, let's just pause on that physical reality for a second. Twenty-five distinct injuries after the primary cause of death.
SPEAKER_00It's a massive amount of physical effort.
SPEAKER_01Right. I'm looking at the case files you brought, and that detail demands extreme scrutiny. When investigators see 25 postmortem sharp force injuries, what does that indicate to you about the physical environment?
SPEAKER_00Well, it indicates absolute certainty of isolation.
SPEAKER_01Yeah, it really does.
SPEAKER_00Inflicting 25 sharp force injuries after death, you know, it requires significant physical exertion and a substantial commitment of time.
SPEAKER_01Because the primary act of murder was already complete.
SPEAKER_00Exactly. The offender chose to remain with the victim's body for a significant duration. You don't engage in that level of sustained post-mortem mutilation unless you are entirely confident you won't be interrupted.
SPEAKER_01Right, like by a passing car or, you know, a dog walker or a police patrol.
SPEAKER_00Yeah. The woods off Fish Cove Road provided an environment of total control. He required a location where he could operate without the pressure of time.
SPEAKER_01And that level of operation brings us directly to the timeline. Sandro Costa IA is the earliest known victim attributed to Rex Heurman.
SPEAKER_00So we are establishing the baseline for an investigative timeline that spans three decades.
SPEAKER_01Right. Based on the biographical data, Heurman was living and working on Long Island in November 1993 while commuting into Manhattan for his architectural career.
SPEAKER_00Though if you are cross-referencing the reporting on this era, you will spot a glaring discrepancy in the data.
SPEAKER_01Oh, the age discrepancy.
SPEAKER_00Yeah. NBC News reported that Huerman was 29 years old at the time of the November 1993 murder. Right. However, the official court record, specifically the press release issued by the Suffolk County District Attorney, states he was 30 years old when he killed Sandra Costia.
SPEAKER_01And we have to use the district attorney's official court record as the anchor.
SPEAKER_00Exactly. We prioritize the prosecution's verified filings over secondary media reporting.
SPEAKER_01So Hurriman was 30 years old.
SPEAKER_00Yeah. And that forces a major analytical question. What was a 30-year-old architect doing with his time?
SPEAKER_01I mean, do we really believe a 30-year-old individual suddenly escalates to this specific level of organized violence out of nowhere?
SPEAKER_00Complete with severe post-mortem mutilation.
SPEAKER_01Right. Is Sandra Castilla his actual first victim, or simply the earliest one law enforcement has successfully identified?
SPEAKER_00Well, the forensic complexity of the North Sea crime scene strongly suggests prior experience.
SPEAKER_01Yeah, it really does.
SPEAKER_00The careful selection of a remote location, the specific method of strangulation, the secured isolation required for prolonged injuries, it all points to a high degree of operational comfort.
SPEAKER_01And this profile does not typically align with an offender's very first attempt at lethal violence.
SPEAKER_00No, usually first offenses are marked by panic.
SPEAKER_01Right. Rapid departure from the scene, mistakes in victim selection.
SPEAKER_00But the Castilla scene shows patience.
SPEAKER_01However, without earlier forensic links, she remains the documented beginning of the timeline.
SPEAKER_00So it is essential to look closely at who Sandra Costilla was.
SPEAKER_01Absolutely.
SPEAKER_00When you dig into these records, the disparity in how her life was documented is just glaring.
SPEAKER_01It really is.
SPEAKER_00Sandra was twenty eight years old. She was a native of Trinidad and Tobago.
SPEAKER_01And in 1993, she was living in the Ridgewood section of Queens, New York.
SPEAKER_00Yeah. The records indicate she occasionally used the surname Cutello.
SPEAKER_01Right. And she was also a mother. Her son was just five years old when she was murdered.
SPEAKER_00Just five.
SPEAKER_01Yeah. And years after her death, a newspaper in her home country, the Trinidad Express, published a headline reading, Sandra gets justice thirty years later. Wow. That acknowledgement in the Caribbean stands in sharp contrast to the near-total media silence she received in the United States.
SPEAKER_00I mean, it is a stark systemic failure. If you review the public case files and the subsequent reporting from the 1990s, there are virtually no detailed accounts from family members discussing her dreams or, you know, her aspirations.
SPEAKER_01Or even her personality.
SPEAKER_00Right. It is basically an empty folder regarding her human identity.
SPEAKER_01Aaron Powell Which is a massive contrast to the later victims in the Gilgo Beach investigation.
SPEAKER_00Yeah, their lives and backgrounds were eventually documented heavily by journalists.
SPEAKER_01The absence of Sandra's personal story from the public record really highlights the investigative priorities of 1990s law enforcement and media.
SPEAKER_00Sandra was an immigrant. She had a documented interaction with law enforcement in 1992, just a minor arrest for fair evasion.
SPEAKER_01Right. And when an individual has marginal interactions with the justice system and lacks a robust support network equipped to demand constant media attention, their narrative is routinely reduced to basic biographical data.
SPEAKER_00Just data and a cause of death.
SPEAKER_01Exactly. Law enforcement resources often follow public pressure. Without sustained media pressure, Sandra's full identity was overshadowed by the clinical, forensic details of her murder.
SPEAKER_00And because of those systemic blind spots, investigators focused their attention on the wrong suspect for 30 years.
SPEAKER_0130 years.
SPEAKER_00The investigation into Sandra Costa Ia's murder centered heavily on a man named John Bitrolf, a carpenter living in Manorville, New York.
SPEAKER_01Right. And the focus on Bitrolf was based on a window of severe violence in Suffolk County that occurred between November 1993 and January 1994.
SPEAKER_00So to understand why investigators were so certain Bitrolf was responsible for Sandra Costa IR, you have to look at the chronological timeline of three specific murders.
SPEAKER_01Three murders taking place over three consecutive months.
SPEAKER_00Right. So on November 2nd, 1993, the remains of Rita Tangretti, a sex worker from East Pachug, were found in Suffolk County.
SPEAKER_01Okay.
SPEAKER_00Less than three weeks later, between November 19th and November 20, Sandra Costa Iar's remains were discovered in North Sea. Right. Then, on January 30th, 1994, the remains of Colleen McNamy were discovered.
SPEAKER_01And she had been beaten, strangled, and left naked in the woods near the William Floyd Parkway in Shirley, New York.
SPEAKER_00Exactly. So you have three women all murdered in Suffolk County within a 90-day window.
SPEAKER_01The similarities drove the investigation entirely.
SPEAKER_00Yeah, the demographic profile of the victims, the geographic clustering within the same county, the remote wooded deposition sites. It created a highly specific parameter.
SPEAKER_01Law enforcement operated on the natural assumption that they were hunting a single offender responsible for all three homicides.
SPEAKER_00Which makes sense at the time. But the breakthrough in the Tangretti and Macnamy cases came in 2013 entirely by chance.
SPEAKER_01Right. The DNA hit.
SPEAKER_00Yeah. Timothy Bitrolf violated an order of protection. That legal violation required him to submit a DNA sample to the state registry.
SPEAKER_01Which is huge.
SPEAKER_00Yeah. Think of a DNA database, like a giant library of fingerprints. For decades, John Bitrolf's genetic profile was not in that library.
SPEAKER_01But when his brother Timothy was arrested, he essentially left his book on the table.
SPEAKER_00Exactly. Investigators analyzed that sample, recognized the familial genetic markers, and followed that branch up the family tree straight to John Bitrolf.
SPEAKER_01And the forensic evidence connecting John Bitrolf to Tangretti and Macnamy was definitive.
SPEAKER_00Highly definitive.
SPEAKER_01So on July 5, 2017, he was convicted of second-degree murder for those two deaths.
SPEAKER_00Yeah, and the court subsequently sentenced him to 50 years to life in prison.
SPEAKER_01The geographical proximity there is hard to ignore, too. I mean, John Bitrolf lived in Manorville.
SPEAKER_00Right.
SPEAKER_01Years later, the torsos of two other victims connected to the Gilgo investigation, Jessica Taylor and Valerie Mack, were discovered just three miles from John Bitrolf's Manorville home.
SPEAKER_00Three miles. The physical overlap of violence in this specific area of Suffolk County is just dense.
SPEAKER_01It really is. And John Bitrolf is seeking exoneration for his convictions now.
SPEAKER_00Right. His legal argument centers directly on those similarities.
SPEAKER_01His defense suggests that Rex Hurriman may actually be responsible for the murders of Tangridi and Macnamy.
SPEAKER_00Arguing that the methods and the geographic dumping grounds overlap too perfectly.
SPEAKER_01Let me play devil's advocate here for a second. Because if you are looking at John Bittrolf's legal argument, it forces a massive question.
SPEAKER_00Okay, what is it?
SPEAKER_01If the forensic evidence holds and Bitrolf killed Tangridi and Macnamy while Huhrman killed Castilla, we are looking at two completely separate serial killers operating in the exact same county.
SPEAKER_00Targeting the exact same demographic.
SPEAKER_01At the exact same time. From a purely geographical standpoint, how does that even happen?
SPEAKER_00The statistical improbability of two distinct serial predators operating simultaneously in Suffolk County is staggering.
SPEAKER_01Utilizing highly similar methodologies and deposition environments, no less.
SPEAKER_00Right. It exposes the severe blind spots in 1990s law enforcement. How did both men operate within this specific three-month window without detection?
SPEAKER_01Well, in 1993, police departments were not sharing data across centralized digital networks.
SPEAKER_00Yeah. They relied on teletypes, physical faxes, and localized intelligence.
SPEAKER_01Exactly. And the victim pool, marginalized women, often navigating vulnerable circumstances, was heavily unprotected.
SPEAKER_00So multiple predators could utilize the exact same hunting grounds, intersecting geographically, without crossing paths.
SPEAKER_01Or without triggering a coordinated multi-jurisdictional task force response.
SPEAKER_00The fragmentation of intelligence allowed both men to operate with absolute impunity.
SPEAKER_01And that assumption that Castilla was part of Bitrolf's cluster stood for 30 years.
SPEAKER_00Until it was finally dismantled by the evolution of forensic science.
SPEAKER_01Right. In June 2024, investigators returned to search the woods in North Sea near Fish Cove Road.
SPEAKER_00They were physically revisiting the original 1993 crime scene.
SPEAKER_01But that physical search preceded the definitive forensic link.
SPEAKER_00Right. It was the application of advanced DNA testing on original evidence preserved from the scene for three decades that altered the entire trajectory of the Gilgo Beach investigation.
SPEAKER_01I'm looking at the document here, and it specifically says three strands of hair found on Sandra's body were retested in 2023 and 2024. The DNA of the male hair sample matched Rex Huerman.
SPEAKER_00Which is incredible from a scientific standpoint.
SPEAKER_01The science behind that match is paramount. In 1993, DNA testing largely relied on methods that required substantial biological material.
SPEAKER_00Like a hair follicle with an intact root.
SPEAKER_01Exactly. A hair fragment without a root was virtually useless for nuclear DNA extraction at that time.
SPEAKER_00But by 2023, forensic laboratories utilized advanced mitochondrial DNA sequencing and single nucleotide polymorphism, or SNP analysis.
SPEAKER_01Right. This allows scientists to extract degraded genetic material from the shaft of a 30-year-old hair and build a complete profile.
SPEAKER_00So those three strands of hair sitting in an evidence locker since 1993 finally cleared John Bitrolf of Sandra Castilla's murder.
SPEAKER_01And definitively linked the crime to Huerman.
SPEAKER_00Which forces us to confront the mechanics of a pre-internet murder.
SPEAKER_01Right, because in 1993 there was no Craigslist.
SPEAKER_00No burner phones.
SPEAKER_01No digital trail of pings between cell towers.
SPEAKER_00Exactly. By the time we reached the timeline of the Gilgo 4 between 2007 and 2010, the offender relied heavily on disposable cellular technology to isolate his victims.
SPEAKER_01But the mechanics of contact in 1993 required immense physical exposure.
SPEAKER_00Yeah. To contact a woman living in the Ridgewood section of Queens, isolate her, and transport her all the way to the rural woods of Southampton, the offender had to utilize in-person encounters.
SPEAKER_01This means engaging in street-level solicitation or placing physical print advertisement.
SPEAKER_00Or using direct face-to-face manipulation.
SPEAKER_01Right. He had to convince her to enter his vehicle without the buffer of anonymity that the Internet later provided.
SPEAKER_00That requires a high degree of interpersonal control and physical risk.
SPEAKER_01And the prosecution provided specific insight into how this offender organized those methods later on.
SPEAKER_00Yeah, prosecutors allege that Sandra Castilla's murder followed the blueprint found in Heurman's Microsoft Word file, which was labeled HK 2002 or 4.
SPEAKER_01But we must verify the exact timeline of that document. Court filings indicate that the HK 200204 file was created in the year 2000 and was actively modified through 2002.
SPEAKER_00So if you do the math on that, the document was created seven to nine years after Sandra Costa Ao was murdered.
SPEAKER_01Exactly. Hurman did not start his violent career with a master plan typed into a laptop.
SPEAKER_00No, he formalized his methods over a decade.
SPEAKER_01Right. He engaged in the physical act of murder in 1993, and nearly 10 years later, he sat down at a keyboard and typed out the tactical lessons he had learned.
SPEAKER_00He retroactively documented his methodology.
SPEAKER_01He treated the murders not as isolated impulsive events, but as an ongoing long-term architectural project.
SPEAKER_00Refining his physical actions into a written protocol, analyzing what worked and what required adjustment.
SPEAKER_01And the timeline of his professional life perfectly aligns with this methodical escalation.
SPEAKER_00Yeah, in 1994, just one year after killing Sandra Costaya, Hurriman founded his own architecture firm, R.H. Consultants and Associates, operating out of Manhattan.
SPEAKER_01So as he was building a legitimate, highly structured professional life, he was simultaneously organizing his violent compulsions.
SPEAKER_00And we know investigators executing search warrants found a copy of the book, The Cases That Haunt Us, by John Douglas in Heurman's office.
SPEAKER_01Right, which is a foundational text detailing famous serial killers and the science of criminal profiling.
SPEAKER_00He was actively studying the literature of homicide investigation.
SPEAKER_01Likely looking for the exact blind spot he could exploit.
SPEAKER_00We also have public records displaying his professional demeanor.
SPEAKER_01Yeah, that 2002 YouTube interview.
SPEAKER_00Right, where Heurman discussed his architectural work and specifically detailed his favorite tool, a cabinet maker's hammer.
SPEAKER_01He called the tool persuasive and stated that it yielded excellent results.
SPEAKER_00When you look at the totality of this profile, you know, the post-mortem sharp force injuries, the detailed planning documents created years later.
SPEAKER_01The specific study of criminal profiling.
SPEAKER_00And the massive duration of his operational timeline, the scope of his potential crimes expands significantly.
SPEAKER_01Absolutely. Joseph Chiacalone, a retired NYPD sergeant and professor at John Jay College, assessed this profile.
SPEAKER_00And what did he conclude?
SPEAKER_01He stated that Heurman could potentially have up to 50 unsolved cases linked to him before the investigation concludes.
SPEAKER_0050 cases. That assessment brings us to the most pronounced void in this entire timeline. Yeah. After Sandra Costaya is killed in November 1993, the next confirmed killing attributed to Heurman in the court records is Karen Vergata in February 1996.
SPEAKER_01That is a gap of 39 months.
SPEAKER_0039 months.
SPEAKER_01We have a 30-year-old offender who commits a highly organized murder involving strangulation and severe post-mortem mutilation, and then, according to the current public record, ceases all violent activity for over three years.
SPEAKER_00So we have to analyze the forensic and psychological plausibility of that gap. Right. Does an offender with this specific, highly methodical profile, someone who later writes a tactical manual on how to commit these crimes, simply stop completely for three years?
SPEAKER_01It goes against the established behavioral models for this type of offender.
SPEAKER_00Serial predators driven by this level of organized compulsion rarely take voluntary pauses of that length, unless forced by external circumstances.
SPEAKER_01A pause usually indicates incarceration, severe physical illness, or a geographic relocation that disrupts their established hunting grounds.
SPEAKER_00But we know Hurman was present on Long Island and actively building his architectural business in Manhattan during those exact years.
SPEAKER_01Right. He was not incarcerated, he was not incapacitated.
SPEAKER_00So if he did not stop, then this three-year void does not represent a pause in his behavior.
SPEAKER_01It represents undiscovered victims.
SPEAKER_00Exactly. It represents a massive hole in the evidence. The timeline from November 1993 to February 1996 remains a critical investigative blind spot.
SPEAKER_01And the transition from analogue, face-to-face hunting in 1993, to the highly digital methods he employed a decade later suggests a continuous evolution.
SPEAKER_00Evolution requires practice.
SPEAKER_01The techniques he documented in his 2000 blueprint were likely honed during those unrecorded years.
SPEAKER_00The gap is the ultimate question of the case's early timeline.
SPEAKER_01And law enforcement is applying the same advanced mitochondrial DNA testing that solved the Castilla case to other unsolved homicides from the mid-1990s, looking for those missing links.
SPEAKER_00Sandra Castilla was 28 years old when she was strangled. It took advanced DNA and three decades to connect her to Rex Hurman.
SPEAKER_01After Costa Ia in 1993, the next confirmed killing is Karen Vergata in 1996, a three year gap. What happened in those three years?
SPEAKER_00Next time, a woman with no name for 27 years, partial remains found on Fire Island in 1996. For 27 years, she was known only as Jane Doe No. 7. Then genetic genealogy gave her back her name, Karen Vergata.
SPEAKER_01Everything we cited is sourced on the Neural Broadcast Network website.