According to police reports, two men have been charged in connection with an assault at the Newmont Slate Quarry in West Pawlet that led to the death of 54-year-old Mark Ray. The incident occurred on August 24, 2025, and Ray succumbed to his injuries on November 12, 2025.
Vermont State Police arrested Richard J. Mattison, 42, of Poultney, on February 18, 2026, on charges of first-degree murder, assault, and robbery. Mattison was apprehended at a residence in Wells and is currently held without bail at the Rutland barracks pending a scheduled arraignment at 12:30 p.m. on February 19 in the Criminal Division of Vermont Superior Court.
Stephen J. Williams Jr., 38, of Granville, New York, was arrested on February 13, 2026, on related assault and robbery charges. He is currently in custody in New York and is expected to be extradited to Vermont.
The investigation by Vermont State Police remains active, and further details are expected to be released following Mattison’s arraignment. It is important to note that charges are allegations, and the legal process is ongoing. Court dates and charges may change as the case progresses.
Source: Vermont State Police press release, view original report. This Vermont arrested assault story highlights important developments. The Vermont arrested assault situation continues to develop.
Legal Disclaimer: All defendants are presumed innocent until proven guilty. Court dates and charges are subject to change. This report is based on information provided by law enforcement and may be updated as more details become available. The Vermont arrested assault situation continues to develop.
Read more Vermont news stories at VTScout.
Source: Vermont State Police
Addison Vermont assault investigation murder charge Vermont State Police West Pawlet
Last modified: February 18, 2026
