(CNN) Before the shock and horror subside after a mass shooting, a long-simmering debate inevitably heats up over gun control.

But the man bought the rifle legally in Nevada . And so the shooting will no doubt focus a spotlight on Nevada's gun laws, some of which are among the nation's least restrictive.

When a gun show takes place in Nevada, rates of gun deaths and injuries rise in neighboring California during the next two weeks, according to a study published in 2017. But when the gun shows take place in California, this local effect is not seen -- even when accounting for California's 10-day waiting period.

Some facts about gun laws in Nevada: