This is really fucked up in every direction. It does sound like the 15 year old was only protecting himself.
Sacramento Bee
https://www.sacbee.com › national › article283538308
3 hours ago — Two teen brothers, 14 and 15, argue over Christmas presents and start gunfight that kills their older sister, Florida sheriff says.
Teen fighting with brother shoots, kills sister: Florida cops
Sacramento Bee
https://www.sacbee.com › national › article283538308
3 hours ago — Two teen brothers, 14 and 15, argue over Christmas presents and start gunfight that kills their older sister, Florida sheriff says.