NEW YORK — The suspect in Long Island’s infamous Gilgo Beach serial killings has lost his bid to separate into multiple trials the sprawling case involving seven brutal killings spanning decades.

New York State Supreme Court Justice Timothy Mazzei ruled Tuesday that the trial against Rex Heuermann, a Manhattan architect who lived on Long Island, would move forward as a single trial.

“We wanted one and that's what we got,” Suffolk County District Attorney Ray Tierney said after the brief hearing in Riverhead court.

Lawyers for Heuermann had argued in court filings that there was no “unique and consistent modus operandi” common to all the murders, as prosecutors claimed. They said the case should be broken up into as many as five trials because the killings involved different time fram

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