Posted on: October 07, 2025 08:20 AM

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Yaphank Woman Pleads Guilty to Manslaughter for Causing Crash That Left One Person Dead and Another Injured

Suffolk County District Attorney Raymond A. Tierney today announced that Melissa Koprowski, 32, of Yaphank, pleaded guilty to Manslaughter in the Second Degree, Vehicular Manslaughter in the Second Degree, and several other related charges,  for causing a fatal crash in November 2024 on Middle Country Road that killed a 75 year-old passenger in another car and injured the driver.  Koprowski was intoxicated and impaired by marijuana at the time of the crash.

“No family deserves to go through the pain and anguish of violently losing a family member, let alone in front of their eyes,” said District Attorney Tierney.  “We hope that today’s conviction brings some measure of justice to the family of Esther Guy.”

According to court documents and the defendant’s admissions during her guilty plea allocution, on November 22, 2024, at approximately 8:39 p.m., Koprowski was operating a 2014 Dodge Durango eastbound on Middle Country Road in Middle Island when she entered the intersection at Wading River Hollow Road and attempted to  make a left-hand turn in front of oncoming traffic, without having the right of way.

At that time, a blue 2022 Nissan Rogue was traveling westbound on Middle Country Road proceeding through the intersection with a green light.  The driver’s two-year-old child and 75-year-old mother, Esther Guy, were seated in the backseat of the Nissan Rogue.  Koprowski’s SUV crashed head-on into the Nissan Rogue within the west bound lane of the intersection, sending the Rogue off the road and into the wooded shoulder.

Immediately following the crash, Suffolk County police and other emergency responders rendered aid to those involved in the collision.  All three occupants of the Nissan Rogue were transported via ambulance to Long Island Community Hospital where the driver of the Nissan Rogue was treated for her injuries.  Esther Guy was pronounced dead shortly after her arrival to the hospital.  The two-year-old child was uninjured.

Koprowski was also transported to Long Island Community Hospital for non-life-threatening injuries.  While at the hospital, officers observed that she displayed indicia of intoxication and placed the defendant under arrest.  Subsequent toxicology testing revealed a blood alcohol concentration of .12% and a high level of THC (the active ingredient of marijuana).

From DA