Apparently they didn’t use a gun or the article would have said so. I wonder how they died.
The note one of the boys left said they were going to shoot them.
“...he called gun control measures in the United States “a joke” and detailed how easy it was for his brother to purchase the guns...” https://www.google.com/amp/s/au.news.yahoo.com/amphtml/chilling-instagram-note-before-family-killed-in-murder-suicide-pact-070551700.html