Haverstraw Police Department officers made an arrest Tuesday afternoon after discovering a loaded stolen firearm during a traffic stop.

According to police, the stop occurred on March 31, 2026, at approximately 4:29 PM in the area of Route 9W and Westside Avenue in Haverstraw. During the investigation, officers determined that one of the occupants of the vehicle was in illegal possession of a loaded handgun.

The suspect was identified as 18-year-old Spring Valley resident Treyvon Montgomery. He was taken into custody at the scene and transported to police headquarters for processing.

Further investigation revealed that the firearm had been reported stolen in 2025 from another state.

Montgomery has been charged with Criminal Possession of a Weapon in the 2nd Degree (loaded firearm), Criminal Possession of a Weapon in the 3rd Degree (large capacity ammunition feeding device), Criminal Possession of a Firearm, and Criminal Possession of Stolen Property in the 4th Degree.

He was arraigned in the Village of Haverstraw Justice Court and remanded to the Rockland County Correctional Facility in lieu of $10,000 cash bail, $60,000 bond, or $100,000 partially secured bond.

The Rockland County Sheriff’s Office assisted in the investigation.

A criminal complaint is merely an accusation, and the defendant is presumed innocent until proven guilty in a court of law.