Rex Heuermann pleaded guilty to killing 7 women, admits to killing eighth | "48 Hours" Full Episode

The investigation into the Gilgo Beach murders began in 2010 during the search for missing escort Shannon Gilbert. This search inadvertently led to the discovery of four other young women's remains: Maureen Brainard-Barnes, Melissa Barthelemy, Megan Waterman, and Amber Costello. All were in their 20s, worked as online escorts, were petite, and three of the four were found wrapped in burlap, a material commonly found in hunting stores.

Police canine Blue found human remains near Gilgo Beach in December 2010, initially thought to be Shannon Gilbert, but instead were the first of the 'Gilgo 4.'

Despite the case going cold for over a decade, a new task force formed in February 2022 quickly connected previously overlooked clues. Amber Costello's roommate, Dave Shaller, had described a client as 'ogre-like' driving a first-generation Chevrolet Avalanche. This vehicle description, combined with burner phone data that triangulated calls to victims within a small 'box' area of Masapequa Park, allowed investigators to narrow down suspects.

Shaller's description of a large-built man driving a first-generation Chevy Avalanche was crucial. Burner phone calls to victims were traced to cell towers within a few blocks of Masapequa Park, leading to the identification of Rex Heuermann, who lived in that area and owned such a vehicle.

The circumstantial evidence was solidified with DNA and digital forensics. Police tailed Rex Heuermann and collected DNA from a pizza crust he discarded. This DNA profile was consistent with a male hair found in the burlap used to restrain Megan Waterman's body. Furthermore, Heuermann's personal cell phone records showed he was in the same locations as the burner phones when victims were contacted, and his online search history revealed extensive interest in sex workers, torture pornography, and even searches for the task force and victims' families.

DNA from Heuermann's pizza crust matched a hair found with Megan Waterman's body, a profile found in only 0.04% of the population. His personal cell phone mirrored burner phone locations, and his email accounts (e.g., Hunter 1903) were linked to thousands of disturbing online searches.

Rex Heuermann was a 6'4" architect who ran RH Consultants and Associates in Midtown Manhattan. Described by coworkers as pompous, intelligent, and a 'troubleshooter' who enjoyed 'outwitting the system,' he also had a passion for hunting and owned nearly 300 guns. Investigators believe he committed the murders during periods when his wife and children were out of town, maintaining a facade of normalcy while leading a secret life as a serial killer.

Coworkers described Heuermann as 'a little bit of a nerd' who was 'pompous' and 'liked to win.' Police found nearly 300 guns in a basement vault. His wife's absences during the summers were noted as potential windows for the crimes.