articleThe Brief Stefanie Rock, 29, was fatally struck by a vehicle while out for a morning run on Deerfield Road in Watermill on Friday. A 29-year-old woman's morning run ended in tragedy when police say she was fatally hit by a vehicle in Southampton last week. What we know:Police responded to reports of a pedestrian being struck by a vehicle near 907 Deerfield Road in Watermill just after 8:30 a.m. Friday. The pedestrian, identified as 29-year-old Stefanie Rock, was running when she was hit by a vehicle driving in the opposite direction. Dig deeper:The New York Post reports that Rock was an up-and-coming real estate broker, who joined JLL’s New York City office in April 2024.