Someone tried to delete this file. Forensic analysts recovered it anyway. According to prosecutors, document HK2002-04 is the Long Island Serial Killer's literal how-to guide for murder.

The file was hidden on one of fifty-eight hard drives seized from Rex Heuermann's Massapequa Park basement. Created in 2000, modified through 2002, it allegedly contained eighty-seven details prosecutors say match the methodology used on the Gilgo Beach victims.

According to court documents: A "Supplies" section allegedly listed cutting tools, acid, tarps, and cat litter. A "Body Prep" section allegedly stated: "remove head and hands, remove ID marks like tattoos." A "Things to Remember" section allegedly contained lessons learned: "Hit harder... light rope broke under stress." References to specific pages in FBI profiler John Douglas's Mindhunter appeared throughout.

Jessica Taylor's remains were found along Ocean Parkway with her head removed and tattoos mutilated—allegedly matching the document exactly. When investigators returned to Rex Heuermann's home with infrared equipment, they found adhesive residue and push pin evidence in the drop ceiling—exactly as allegedly described.

DA Ray Tierney: "The exact method by which these murders were committed in excruciating detail in that document is in some cases identical to the methodology used to murder the victims."

The family that lived with Rex for twenty-seven years has fractured completely. Wife Asa Ellerup still calls him her "hero" and describes jail visits like "a first date." Daughter Victoria reached a different conclusion after speaking with BTK's daughter: "most likely" guilty.

According to prosecutors, female hairs on multiple victims were allegedly consistent with DNA from both women. Neither is accused—prosecutors say the hair transferred from clothing or the home. Women linked to murder victims they never knew existed.

The daughter saw what the wife cannot. Both are victims. Just not of the same truth.

Rex Heuermann has pleaded not guilty. Trial is September 2026.

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Part 5 of 5: How the alleged Long Island Serial Killer was finally arrested.

Investigators had been watching the man they believed was LISK for months. They had cell tower evidence placing his phone with burner phones in every instance. But they needed DNA to make the Gilgo Beach case.

Then he threw away a pizza box.

In this final episode, we examine how a discarded pizza crust allegedly provided the evidence that led to charges in the thirteen-year Gilgo Beach cold case—and what happens when Rex Heuermann faces trial in September 2026.

The investigation stalled for years after bodies were discovered along Ocean Parkway in 2010 and 2011. Then a new Suffolk County task force formed in February 2022. Six weeks in, an investigator noticed an old witness statement about an "ogre-like man" driving a Chevrolet Avalanche near where Amber Costello vanished.

A database search returned one name.

Cell phone records allegedly connected the alleged Gilgo Beach Killer to burner phones in every instance. But they needed physical proof.

Enter whole genome sequencing—technology that can extract DNA from degraded samples. According to prosecutors, hairs on six of seven victims linked to LISK or his family.

Then the pizza. DNA from the crust matched a male hair on Gilgo Four victim Megan Waterman. A profile found in only 0.04% of the population.

July 13, 2023. The alleged Long Island Serial Killer arrested outside his Manhattan office. Twelve-day search of his Massapequa Park home. Fifty-eight hard drives. Over two hundred firearms. The planning document.

The defense has challenged the DNA technology. Judge Mazzei allowed it—first time in a New York criminal trial. The LISK trial happens September 2026.

After thirty years and seven women, the architect will finally face trial for the Gilgo Beach murders.

Thank you for following this series.

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Part 4 of 5: How prosecutors say the alleged Gilgo Beach Killer selected, contacted, and killed his victims along Long Island.

July 2009. Amanda Barthelemy, fifteen years old, received a call from her missing sister's phone. A man's voice asked: "Do you know what I did to your sister?"

Over the following weeks, the man called seven times. He described what he'd done. On August 26, he said: "You won't see her again. I killed her."

In this episode, we examine the alleged LISK hunting pattern that prosecutors say links Rex Heuermann to seven Long Island murders over three decades.

The Gilgo Four and other victims share characteristics. All were sex workers. All were petite—the planning document allegedly notes "small is good." All advertised on Craigslist. All were allegedly contacted via burner phones. All allegedly disappeared when the alleged Long Island Serial Killer's family was traveling.

According to court documents, investigators found no instance where Heuermann's personal phone was in a different location than burner phones used to contact the Gilgo Beach victims. The FBI traced calls to "the box"—a small area of Massapequa Park.

Heuermann's house was inside the box.

Suffolk County prosecutors also allege fake email accounts under names like John Springfield and Thomas Hawk—used to create profiles and contact sex workers. Even in 2022, investigators watched the alleged Gilgo Beach Killer add money to burner phones.

And the alleged taunting went beyond phone calls. Prosecutors say LISK searched obsessively for the Ocean Parkway investigation. For photos of victims. For photos of their families.

DA Tierney: "His intent was specifically to locate these victims, to hunt them down, to bring them under his control, and to kill them."

Rex Heuermann has pleaded not guilty. The Gilgo Beach trial is September 2026.

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