The Santa Clarita Shooter Used a Homemade 'Ghost Gun' From a Kit. He Had Another at Home.
The spare-parts kits — mostly ordered online — don’t have serial numbers, making it difficult for investigators to trace them back to their owner.
The Largest Study on School Shooters Since Columbine Found They Have a Few Key Things in Common
The first comprehensive assessment of school shooters since Columbine covered 41 shootings between 2008 and 2017.
Everything We Know About the School Shooting in Brazil
"Things like this don’t happen in Brazil, but other countries,” said the Brazilian vice president, who added “violent video games” may have influenced the killers.