Suspected Gilgo Beach serial killer Rex Heuermann is expected to plead guilty to viciously murdering seven sex workers in a twisted case that has rocked Long Island for nearly two decades, according to sources.

The hulking Massapequa Park architect’s defense attorney Michael J. Brown and Suffolk County District Attorney Ray Tierney are currently hashing out a plea deal that could see Heuermann, 62, cop to the savage killings at his April 8 appearance in Suffolk County Court, sources told The Post.

It’s unclear what charges Heuermann would plead to or any specifics of the deal being hammered out.

The hulking Massapequa Park architect’s attorney and Suffolk County District Attorney Ray Tierney are currently hashing out a plea deal, sources told The Post. Newsday

Relatives of the victims said they were informed a plea would happen next month, according to Newsday.

The Suffolk DA’s Office and Brown did not immediately respond to The Post’s request for comment.

Heuermann is accused of killing seven sex workers and dumping their bodies along barren stretches of Long Island near Gilgo Beach between 1993 and 2010.

The gruesome slayings remained unsolved until Suffolk County authorities reopened the cold cases, which led to Heuermann’s arrest outside his Midtown Manhattan offices in July 2023.

The married father of two was initially charged with three of the murders, but was later linked to seven through high-tech DNA matches, according to prosecutors.

The seven Long Island sex workers allegedly killed by Rex Heuermann.
Suffolk County Police Department

Tierney has tied Heuermann to the killings of Valerie Mack, 24, Jessica Taylor, 20, Megan Waterman, 22, Melissa Barthelemy, 24, Maureen Brainard-Barnes, 25, Amber Lynn Costello, 27, and Sandra Costilla, 28.

All of the victims peddled sex through online ads in the metro area before disappearing.

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All seven of Heuermann’s victims peddled sex through online ads in the metro area. AP

State and county investigators also searched Heuermann’s disheveled Massapequa Park home twice, and allegedly uncovered computer files that further tied him to the murders.

The accused serial killer has been locked up since his arrest.

Heuermann has pleaded not guilty to all charges, and his trial was expected to begin in September.