A 14-year-old boy allegedly fatally shot his older sister in Florida after a family argument over Christmas presents, officials said Tuesday.

The teen had been out shopping on Christmas Eve with Abrielle Baldwin, his 23-year-old sister, as well as his mother, 15-year-old brother and sister’s children, Pinellas County Sheriff Bob Gualtieri said during a news conference.

The teenage brothers got into an argument about who was getting more Christmas presents.

“They had this family spat about who was getting what and what money was being spent on who, and they were having this big thing going on in this store,” Gualtieri said.