(NEW YORK) — Gilgo Beach suspect Rex Heuermann has been charged with two additional murders and is now accused of killing six women dating as far back as 1993, according to a court document unsealed Thursday.

Heuermann is accused of the 2003 murder of Jessica Taylor, whose remains were found on Long Island in Gilgo Beach and in Manorville, and accused of the 1993 murder of Sandra Costilla, whose remains were found in North Sea, Long Island, in 1993, according to court documents.

These developments significantly expand the timeline in the Gilgo Beach case.

Investigators searched Heuermann’s Long Island home as recently as May. Authorities also searched a wooded area in Manorville on Long Island in April as part of the investigation, according to law enforcement sources.

Heuermann, an architect and father, was arrested in July and initially charged with murdering three escorts: Megan Waterman, Amber Costello and Melissa Barthelemy. He was charged in January with the murder of a fourth escort, Maureen Brainard-Barnes.

The remains of all four women were found in 2010 in desolate spots along the ocean near Gilgo Beach. Six additional sets of remains were also found in the area.

Heuermann pleaded not guilty to the four murders.

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