A 14-year-old has been charged with murder after being accused of fatally shooting his older sister on Christmas Eve during a family dispute over gifts, Tampa Bay area authorities say.

His 15-year-old brother has also been charged with attempted murder after he allegedly shot the younger brother in retaliation for the shooting of their sister, Abrielle Baldwin, 23, the Sheriff’s office of Pinellas County, Florida, announced.

The dispute began when the siblings, along with their mother and Baldwin’s two children, were shopping for presents on Christmas Eve and began arguing because the 15-year-old felt his brother was getting more gifts, Sheriff Bob Gualtieri said during a press conference .