Rex Heuermann is now facing even more disturbing allegations after prosecutors claimed investigators uncovered a detailed “planning document” outlining how to prepare for, carry out, and clean up murders.
Authorities in New York announced that the Manhattan architect was indicted on two additional murder charges connected to the deaths of Sandra Costilla in 1993 and Jessica Taylor in 2003. The new charges bring the total number of murders tied to Heuermann to six.
Heuermann was first arrested in July 2023 in connection with the infamous Gilgo Beach serial killings case after years of investigation into bodies discovered along Gilgo Beach on Long Island. Prosecutors had already charged him in the killings of Megan Waterman, Melissa Barthelemy, Amber Costello, and Maureen Brainard-Barnes.
Now, investigators say newly recovered digital evidence paints an even darker picture.
According to court documents, authorities allegedly found a file described as a “planning document” in which Heuermann meticulously listed potential problems, supplies, and strategies allegedly related to committing murders without leaving evidence behind.
The document reportedly included sections labeled “Problems,” “Supplies,” “DS,” and “TRG.” Under “Problems,” prosecutors claim the notes referenced concerns such as “hair & fiber,” “DNA,” “finger prints in gloves,” and “blood stains.” Another section allegedly listed items like cutting tools, acid, a burn can, and even a police scanner.
Perhaps most chilling, prosecutors allege another section stated “small is good,” which investigators believe referred to the petite stature of the alleged victims.
The indictment also claims the document included reminders such as getting enough sleep before a “hunt” and instructions about striking victims harder to avoid resistance. Prosecutors say another note discussed maximizing “play time” while masking noise, which investigators believe referred to violent acts committed against victims.
Authorities further allege that DNA evidence, internet searches, phone records, and violent pornography collections helped connect Heuermann to the murders.
Heuermann has pleaded not guilty to all charges.
As the case continues unfolding, the alleged discovery of the planning document has intensified public fascination and horror surrounding one of America’s most infamous unsolved serial killer investigations.
