This 3 August 2019 video from the USA says about itself:
While officials did not immediately announce the identity of the shooter, the Washington Examiner reported that “A law enforcement source in El Paso told the Washington Examiner that 21-year-old suspect Patrick Crusius from Dallas, Texas, has been taken into custody.”
A manifesto purportedly written by Crusius, perhaps even in the hours before the shooting attack that according to one report left at least  people dead, was left behind. Pages of the manifesto included anti-immigrant rhetoric with the author going into depth on why he is “against race mixing”, supports the idea to “send them back” and offering a prediction of “genocide”.
This tweet refers to the Twitter account of the El Paso, Texas mass murderer Crusius. ‘MAGA‘ refers to Make America Great Again, Donald Trump‘s slogan. ‘Duke’ refers to racist Republican politician and ex-Ku Klux Klan Imperial Wizard David Duke.
STRING OF TEXAS CHILD SHOOTINGS HIGHLIGHT GUN VIOLENCE Five children were shot in four separate incidents over the weekend in Texas, highlighting a sobering statistic for a state already struggling with gun violence: Texas ranks first in the nation for unintentional shootings involving children. [HuffPost]