Suspected El Paso shooter indicted on capital murder charge by grand jury

The suspect in the mass shooting at a busy Walmart in El Paso was indicted Thursday for capital murder.

The 21-year-old suspect, of Allen, Texas, was indicted in connection with the Aug. 3 mass shooting that left 22 dead. He is jailed without bond.

El Paso prosecutors are seeking the death penalty.

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Prosecutors say he surrendered to police after the attack saying, "I'm the shooter," and that he was targeting Mexicans.

In court documents, prosecutors alleged that the suspect is the author of a screed published shortly before the shooting that said it was "in response to the Hispanic invasion of Texas."

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The screed cited inspiration of an Australian (awaiting/currently on) trail in New Zealand after the murder of 51 people at two mosques in the town of Christchurch.

Survivors of the El Paso attack have held vigils around the city, including outside of the jail in downtown El Paso where the suspected shooter has been kept isolated from other prisoners, on suicide watch.

The case has fueled anger among gun control and immigration advocates, and caused political blowback.

MORE: Lawyers for family of El Paso suspect claim his mom contacted police weeks before mass shooting

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Texas Gov. Greg Abbott acknowledged weeks after the attack that "mistakes were made " when he sent a fundraising mailer encouraging supporters to "take matters into our own hands" and "DEFEND" Texas.

Abbott has pledged to invest in a domestic terrorism taskforce and has suggested he would support and expansion of firearm background checks. He has resisted calls to regulate the sale of military-style rifles like the one authorities say the suspect used in El Paso.