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before Amber Costello went missing her friend and former roommate Dave Schaller says she had received repeated phone
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calls from a client this guy was so relentless he called several times he was on the phone with her for quite a
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while each time on September 2nd 2010 police say amber Costello an escort left her home to meet that client and was
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never seen again I walked out the front door with her she she gave me a hug she's like I love you
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and she left after Amber's disappearance Schaller told police about Amber's clients and
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described one as large looking like an ogre and having a first generation Chevy Avalanche at least back then also knew
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Amber's client was using a burner phone and they knew that Megan Waterman and Melissa Bartholomew were also contacted
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by burner phones right before they disappeared in 2012 with the help of the FBI they determined those calls
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connected to cell towers inside a small area of Massapequa Park New York they called it the Box
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in 2022 a new task force came across that old description in the case files and started looking for a large man who
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lived in that box area and owned a Chevy Avalanche at the time of the disappearances was there a aha moment
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when all of a sudden his name came up once we were able to attach the Avalanche inside of that Massapequa box
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which then attached to Rex Sherman that was a moment where we said okay there's something here
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investigators also say they discovered huermann set up email accounts using fake names one of those accounts linked
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to human prosecutors say was used to conduct quote thousands of searches related to sex workers sadistic
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torture-related pornography and child pornography there was a lot of torture uh porn and depictions of women uh being
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abused uh being raped and being killed investigators say that while they were busy watching huermann huermann was
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trying to watch them conducting searches on the investigation and the Gilgo victims not only pictures of the victims
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pictures of their relatives their their sisters their children and he was trying
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to locate those individuals the circumstantial evidence against human was building but investigators also had
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physical evidence from the crime scenes they wondered if they could link to him after authorities found Megan Waterman
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in 2010 they found a male hair sample on the burlap around her body in January 2023 a surveillance team
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tailed huermann and recovered a pizza box he threw out in Manhattan the pizza which was you know obviously very
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significant district attorney Ray Tierney says the DNA on that pizza crust was consistent with the DNA profile from
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the hair found with Megan Waterman's body that was a remarkable day it was you know the weekend and you know you
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read you get the report and you read it and then you read it again and then you read it a third time and then you read
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it a fourth time and then you start making calls after his arrest for the murders of Megan Waterman Amber Costello
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and Melissa barthelemy Rex heuerman pleaded not guilty