U.S. Attorney for the Western District of Texas John Bash said they would seek the death penalty in the mass shooting at Walmart in El Paso, Texas during a press conference Sunday, Aug. 4, 2019 at the Office of Emergency Management. Patrick Crusius was booked on charges of capital murder. El Paso Mayor Dee Margo is at left. (Mark Lambie/The El Paso Times via AP)
WASHINGTON Federal authorities investigating the El Paso shooting call it an act of domestic terrorism, but they cannot apply the same terrorism law that prosecutors have used for years against supporters of the Islamic State and al-Qaida.