DALLAS (AP) - Federal authorities said they are treating the El Paso shooting as a domestic terrorism case.
A rambling screed posted just before the El Paso shooting said the massacre was in response to the "invasion" of Hispanics coming across the southern border.
It railed against the dangers of mass immigration, warned that Hispanics will eventually take over the economy and government, and argued that attacking "low-security" targets was a way to "fight to reclaim my country from destruction."
El Paso's police chief says he increasingly believes these are the words of 21-year-old suspect Patrick Crusius, who surrendered shortly after Saturday's rampage. Investigators were looking closely at the writing as they weighed whether to prosecute the slaughter of 20 people as a hate crime.
A local prosecutor announced that he would file capital murder charges, declaring that the assailant had "lost the right to be among us."
The border city is home to 680,000 people, most of them Latino.