The FBI has labeled two of those attacks , at a Texas Walmart and California food festival, as domestic terrorism — acts meant to intimidate or coerce a civilian population and affect government policy. But the bureau hasn’t gone that far with a shooting at an Ohio entertainment district.

Even if there’s a domestic terrorism investigation, no specific domestic terrorism law exists in the federal criminal code. That means the Justice Department must rely on other laws such as hate crimes and weapons offenses in cases of politically motivated shootings.

The legal gap has prompted many survivors, victims’ families, law enforcement officials and legal experts to call on lawmakers to create a domestic terrorism law that could aid investigators and punish perpetrators.

Read more: AP