Man stabbed to death at Stony Brook Yacht Club, woman charged with murder

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New York police have arrested a 33-year-old woman in connection with the brutal death of a 52-year-old man outside a yacht club on the beautiful north shore of Long Island.
The Stony Brook Yacht Club parking lot is known more for canoe launches and wedding photos than crime scene tapes, but police allege Kacy Corso, of nearby Setauket, was involved in the stabbing death of Selden man Christopher Millwater.
The argument began in the parking lot across from 21 Shore Road used by visitors to the Three Village Inn, a restaurant and wedding venue along with a pair of marinas located about 60 miles east of New York City.
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A number of end-of-season boats will remain at the Stony Brook Yacht Club marina on November 16, 2025. (Michael Ruiz/Fox News Digital)
The yacht club is surrounded by cameras, with multiple cameras mounted on each light pole, and sources tell Fox News Digital that much of the violence was captured on video.
Corso was scheduled to appear in court Thursday morning in Central Islip on a charge of second-degree murder. Under New York law, this is a premeditated murder charge.
It was not immediately clear whether additional charges were expected.

Christopher Millwater, featured in an undated mirror selfie, was murdered outside the Stony Brook Yacht Club. (Christopher Millwater/Facebook)
A July post from a Facebook account in Corso’s name indicates that he knew Millwater before his death.
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The same account posted at least one other photo taken in July from the yacht club parking lot, an area near the boat ramp where fishermen can access the canal mouth from the dock. Millwater “liked” one of her posts days ago.
Court records show he made unrelated charges at another boat launch in the area earlier this year.

A number of end-of-season boats will remain at the Stony Brook Yacht Club marina on November 16, 2025. (Michael Ruiz/Fox News Digital)
On May 5, he was charged with illegally accessing the boat ramp parking lot in the neighboring town of Smithtown and entering or remaining in a park or beach area after dark.
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According to Millwater’s Facebook page, he was told “everything is fine” following his battle with cancer in October.
His sister told the local television station: News 12He said Stony Brook is his favorite place to fish.




