Overview
- A woman identified as 29-year-old Stefanie Rock was struck while running on Deerfield Road in Water Mill and was pronounced dead at the scene.
- Southampton Town police say the driver stayed, cooperated with officers, was taken to Southampton Hospital for evaluation and then released.
- Authorities have opened an investigation and have not publicly said whether any criminality is suspected in the collision.
- Rock was a rising commercial real estate associate at JLL who graduated from Vanderbilt in 2019 and worked on Manhattan leases including a 2024 full-floor deal for GlossGenius.
- The crash has drawn attention to pedestrian safety on rural Hamptons roads and could prompt local calls for traffic or safety reviews along remote stretches like Deerfield Road.