Rex Heuermann was initially arrested and charged in the deaths of the women known in the press as "The Gilgo Four": Melissa Barthelemy, Megan Waterman, Amber Costello, and Maureen Brainard-Barnes.

A year later, Heuermann faces additional charges of second-degree murder in the killings of two more women, Jessica Taylor and Sandra Castillo, who were found in the same area as the Gilgo Four.

After his arrest, investigators seized several electronic devices from Heuermann, including a laptop containing a secret Microsoft Word document titled "HK2002-04," which they describe as a "blueprint" for the architect's murders.

Even more disturbing, investigators believe that the alleged serial killer Rex Heuermann may have kept his victims alive for several days to inflict pain and torture. They have used the family's calendars to determine when Heuermann was alone in the house while his wife and children were away, comparing those dates to when some of his alleged victims went missing.