In 2022, Nevada enacted a ban on ghost guns, which are firearms without serial numbers that are sold as kits that users assemble on their own. It is one of 15 states that created legislation regulating those weapons, which law enforcement has flagged as untraceable.

Investigators discovered a second note at the Las Vegas home of the gunman who killed four people in midtown Manhattan, officials said. The note mirrors the one found on his body in New York, where he blamed football for his mental illness as authorities examine his brain for signs of CTE.