For decades, terrorism researchers have generally distinguished terrorism from other forms of violence by one defining feature: the intention to intimidate a wider audience beyond immediate victims.

That distinction has shaped both academic research and criminal prosecutions in the U.S. Yet scholars have long debated a deceptively simple question: Is terrorism defined by why violence is committed, or by what the violence is intended to achieve? A new prosecution in Austin, Texas, may test whether that understanding is beginning to change.

The question is now before Texas courts following charges against 17-year-old Cristian Fajardo Mondragon, who, along with two juveniles, is accused of carrying out a two-day series of shootings, vehicle thefts and burglaries across Austin in May 2026. In Texas, 17-year-olds are charged as adults, not juveniles.

According to investigators, the group allegedly fired nearly 150 rounds during 13 separate shootings. They struck homes, occupied vehicles and two fire stations, injured multiple people and prompted shelter-in-place orders.

The case initially involved charges including aggravated assault, deadly conduct and firearm theft. Later, investigators recommended a first-degree terrorism charge, a rarely used offense in a case involving a juvenile suspect.

As a scholar of extremism, I believe this decision reflects a shift in how some prosecutors are applying terrorism laws. Rather than requiring proof of an offender’s political ideology, charging documents often focus on whether the alleged violence was intended to intimidate or coerce a civilian population, create widespread fear or influence government or public behavior.

No single federal crime

There is no single federal crime called “domestic terrorism.”

Federal law defines it as dangerous criminal acts intended to intimidate or coerce civilians or influence government policy. However, Congress has never created a standalone federal domestic terrorism offense.

Instead, federal prosecutors generally rely on statutes covering murder, firearms offenses, conspiracy, hate crimes or civil rights violations. In many domestic terrorism cases, terrorism is not itself the criminal charge. Rather, terrorism designations can affect investigative priorities and may have specific legal consequences where particular statutes apply.

As my own research on terrorism and political violence has found, legal definitions........

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