New Cassel Man Arrested After Taxi Driver Stabbed in Westbury; Suspect Returned To The Scene And Was Identified By Witness

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Mugshot of Sergio Ariel Guevara, a 27-year-old New Cassel man charged with assault and weapon possession after a stabbing involving a taxi driver in Westbury.
Sergio Ariel Guevara, 27, of New Cassel, was arrested after police said he stabbed a taxi driver during an altercation in Westbury on October 29, 2025. Officers applied a tourniquet to the victim’s arm before transporting him to the hospital.

WESTBURY, N.Y. — A 27-year-old man from New Cassel has been arrested after police say he stabbed a taxi driver during a late-night altercation in Westbury.

According to detectives, Sergio Ariel Guevara entered a taxi on Maple Avenue around 11:00 p.m. on Wednesday, October 29, 2025, where a dispute broke out with the 31-year-old driver. During the encounter, Guevara allegedly displayed a knife and stabbed the driver in the arm before fleeing the vehicle.

The injured driver managed to drive a short distance away and call for help. Responding officers found him bleeding heavily from a deep laceration to his left arm. Police quickly applied a tourniquet to control the bleeding before transporting the victim to a nearby hospital, where he was treated for non-life-threatening injuries.

A tourniquet is a device, typically a strip of cloth or rubber, wrapped tightly around a limb to stop or slow the flow of blood. It is used in emergencies to control severe bleeding from an extremity when other methods like direct pressure have failed. Tourniquets are also used in medical procedures like surgeries or when drawing blood.

As officers continued their investigation and interviewed witnesses at the scene, Guevara reportedly returned to the area and was identified by a witness. He was taken into custody without further incident, and a knife believed to have been used in the assault was recovered.

Police say Guevara was also taken to a local hospital for assessment before being processed at the precinct.

He is charged with Assault in the First Degree and Criminal Possession of a Weapon in the Fourth Degree. Guevara was scheduled for arraignment on Thursday, October 30, 2025, at First District Court, located at 99 Main Street in Hempstead.

Key Facts & Details

CategoryInformation
DefendantSergio Ariel Guevara, 27, of 267 Wright Street, New Cassel
Incident Date / TimeWednesday, October 29, 2025, 11:00 p.m.
LocationMaple Avenue, Westbury
Victim31-year-old male taxi driver (name withheld)
Weapon RecoveredKnife
InjuryDeep laceration to left arm; treated at hospital
Arrest CircumstancesSuspect returned to the scene and was identified by a witness
ChargesAssault 1st Degree • Criminal Possession of a Weapon 4th Degree
ArraignmentThursday, October 30, 2025 — First District Court, 99 Main Street, Hempstead
Arresting UnitNassau County Police Department – Third Squad
StatusAwaiting court appearance
Important: This story is categorized as a crime story and thus it is important to note that charges are accusations and defendants are presumed innocent until proven guilty in a court of law.
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