https://www.nbcnews.com/news/us-news/florida-teen-accused-fatally-shooting-sister-argument-christmas-gifts-rcna131280

A 14-year-old Florida teen fatally shot his sister in an argument over Christmas gifts, only to be shot moments later by his own teenage brother, authorities said.

The argument started when the brothers, ages 14 and 15, were out shopping on Christmas Eve Sunday with their mother and sister, and got into a spat over who was receiving more Christmas gifts, Pinellas County Sheriff Bob Gualtieri said during a news conference.

After shopping, the boys, their mother, their 23-year-old sister Abrielle Baldwin, and Baldwin's two young children, ages 6 and 11 months, went to their grandmother's home in Largo where the argument continued.

That's when the 14-year-old brother "stood in the doorway, he took out his .40 caliber semi-automatic handgun, and he pointed it at [his brother] and told him he was going to shoot him in the head,” Gualtieri said.

The 14-year-old tried to get his 15-year-old brother to fight and an uncle ended up separating them and moving the 14-year-old outside into the driveway area.

That’s where he found Abrielle carrying her 11-month-old baby in a carrier. She told him: “You all need to leave that stuff alone. Why are you trying to start it? It’s Christmas,” Gualtieri said.

The 14-year-old ensued to argue with her, called her “derogatory” terms, and shot her in the chest as she was holding her infant in the carrier, the sheriff said. She fell, and the baby fell too, but was unharmed.

The 15-year-old brother then came outside, and brought out a .45 caliber semi-automatic handgun, and exclaimed, "You shot my motherf------ sister!" and shot the 14-year-old one time in the stomach, according to the sheriff's office.