( CNN) A wife walking her puppies near her western New York home was fatally shot Wednesday by a boy who told police he mistook her for a deer.

Rosemary Billquist, 43, was hit by a bullet from a single-shot pistol fired by neighbour Thomas B. Jadlowski, said Sgt. Josh Ostrander of the Chautauqua County Sheriff’s Office.

Jadlowski told investigators he was 200 yards from the victim where reference is fired.