Armonk Man Pleads Guilty to Attempted Assault of Police Officer

Joseph Spennato faces 11 years in prison for attack on officers responding to medical call.

Apr. 10, 2026 at 2:22pm

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An extreme close-up photograph of a police officer's badge or handcuffs against a pitch-black background, lit by a harsh, direct camera flash to create a stark, gritty, investigative aesthetic.A police officer's tools of the trade become the focus of a stark, gritty image that reflects the dangers they face in the line of duty.Armonk Today

A 39-year-old Armonk man has pleaded guilty to felony attempted aggravated assault upon a police officer after he tried to stab a sergeant while being arrested, prompting an officer to shoot him. Joseph Spennato is facing 11 years in state prison for the 2024 incident.

Why it matters

The case highlights the dangers police officers face even on routine calls, as well as the challenges of balancing public safety with use of force by law enforcement.

The details

In May 2024, two North Castle police officers responded to a 911 call for a medical emergency when they became aware that Spennato, who had outstanding warrants, was also at the home. When the officers tried to arrest Spennato, he used a knife to attempt to stab Sgt. William McClure multiple times in the back before Officer Chris Costa shot Spennato twice.

  • On May 20, 2024, around 12:30 p.m., the incident occurred.
  • Spennato pleaded guilty in Westchester County Court on April 10, 2026.
  • Spennato's sentencing is scheduled for May 20, 2026.

The players

Joseph Spennato

A 39-year-old Armonk resident who pleaded guilty to felony attempted aggravated assault upon a police officer.

Sgt. William McClure

A North Castle police officer who was the target of Spennato's knife attack, but was protected by his ballistic vest.

Officer Chris Costa

A North Castle police officer who shot Spennato twice, ending the attack.

Susan Cacace

The Westchester County District Attorney who announced Spennato's plea deal.

Jonathan Strongin

The Trial Division Bureau Chief who prosecuted the case.

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What they’re saying

“This case serves as a stark reminder of the extreme dangers our police officers face daily, regardless of which community they serve.”

— Susan Cacace, Westchester County District Attorney

What’s next

Spennato's sentencing is scheduled for May 20, 2026, where he is expected to receive 11 years in state prison along with 5 years of post-release supervision.

The takeaway

This incident underscores the risks police officers take to protect the public, even on seemingly routine calls, and the challenges of balancing public safety with the appropriate use of force by law enforcement.