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Fowler was arrested after detectives used Department of Motor Vehicle records to trace broken headlight lenses found at the accident scene to his vehicle, said Nassau County police officer Thomas Blanchard.
Police said Nina Sharma, 49, was struck by the vehicle as she stood at the foot of the family driveway, waiting for her husband, Raj, to bring trash cans to the curb, before they took a late-night walk.
Homicide detectives said the impact threw or dragged her about 65 feet. She was pronounced dead at Nassau University Medical Center.
The couple, who have three children, own a clothing business in Hicksville.