A grandmother fatally shot her former daughter-in-law in an upscale New York City neighborhood, then killed herself amid a child custody dispute, authorities said.

Marisa Galloway, a 45-year-old mother of two girls, had just put her 1-year-daughter in the back seat of her white Honda Civic and was loading a stroller in the trunk about 9 a.m. Friday when Kathleen Leigh, 65, walked up and shot her in the head, Chief of Detectives Joseph Kenny said at a New York Police Department news conference Friday.

Leigh, a retired Chicago probation officer who had been living with family in New York City the past three years, shot Galloway again in the back while she was lying on the ground before turning the gun on herself, Kenny said, citing security video of the shootings that police had viewed.

Galloway died after being taken to a hospital, Kenny added.