Prosecutors shared that computer forensic evidence and cellphone data, as well as the discovery of DNA found on three of the victims that was ultimately matched that to either Heuermann or his wife led to his arrest.
The “burner” phone used to contact the victims was later linked to Heuermann using his American Express activity at the time of the phone’s purchase, as well as the cellphone’s usage in proximity to Heuermann’s then-New York City office.
From March 2022 to June 2023, the “Thawk Email Account” also did over 200 searches related to LISK, from Googling about the victims to stories about the unsolved murders, the docs state. “The Thawk Email Account was also used to search for a number of podcasts and/or documentaries regarding this investigation, as well as repeatedly viewing hundreds of images depicting the murdered victims and members of their immediate families,” prosecutors added.
According to prosecutors, the client was Heuermann, who contacted Costello the following day using one of his burner phones. “Amber told us that he wanted to see her again, but he didn’t want to come back to the house because of her boyfriend,” the witness told police following Costello’s disappearance.
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