The teen, who authorities believe fatally shot his father before the rampage, also injured two others at the school – a teacher and a student – before he was taken into custody, police said.
Jacob's mother, Renae Hall, told reporters Saturday that Jacob loved superheroes – especially the Teenage Mutant Ninja Turtles – and "wanted to save everybody," WHNS reported.
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So that's how his family will remember him at his funeral Wednesday.
"I don't want suits and ties and all that," Hall said of the service, set for 11 a.m. at Oakdale Baptist Church. "There will be a lot of children there, and I don't want it to be scary for them. Jacob will be dressed in his superhero costume."
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The pallbearers also will wear superhero costumes, said Hall, who is encouraging guests to dress as their favorite heroes.
Batman and a special Batmobile will be at the funeral, as well, thanks to charity group Heroes 4 Higher.
"We're just going there to honor his life and celebrate him," John Buckland, founder of Heroes 4 Higher, told the Huffington Post. "We're really just there to go and support his family, and at the same time, we want to take this situation and inspire people to take pain and turn it into power."
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