He is being held without bail, and federal prosecutors are considering charging him with a hate crime.
The Post cites an arrest warrant affidavit the newspaper obtained.
The police official who spoke with Crusius's mother did inquire if the person in question was "suicidal or have they made any threats towards any other person?" and the mother indicated he had not, police said.
The attack came hours before another mass shooting in Dayton, Ohio, in which nine people were killed.
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Julianne March, 49, was arrested earlier this month after she was taken off a United Airlines plane when it landed in Indiana . Feeling frustrated, passenger Aaron Scherb took to Twitter to call out the carrier for their employee's risky behavior.
Antonio Brown files grievance against National Football League over his helmet
Brown has reportedly on three occasions attempted to wear the helmet at practice after being told by the team he's not allowed to. Antonio Brown hasn't played a single game with the Oakland Raiders yet and he's still been a huge distraction for them.
Subway is testing a Beyond Meat plant-based meatball marinara sandwich
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In his affidavit, Garcia said Crusius waived his right to an attorney and gave an interview to police after his arrest.
The auto he emerged from on Saturday was about a half mile from the Walmart, stopped on a street that essentially divides shopping areas from residential areas. The four-page document talked about a "Hispanic invasion of Texas". It was unclear where Crusius was heading, though Allen has suggested that he did not know the area well and got lost in a neighborhood upon arriving. Claudia Duran, a spokeswoman for the El Paso County district attorney, said that won't happen until the investigation by El Paso police and the FBI concludes. He admitted he was explicitly targeting Mexicans, AP reported. His lawyer, appointed by the court, did not immediately comment about the filing; a judge on Friday agreed to appoint a second attorney for Crusius.
Crusius's relatives have decried "the destruction Patrick did" and condemned the ideas described in the online statement. "He was raised in a family that taught love, kindness, respect, and tolerance - rejecting all forms of racism, prejudice, hatred, and violence".
A screenshot of a message written on the inside of an portable restroom at the construction site for Globe Life Field says, "You think what happened in El Paso was bad just wait until what happens here on Saturday!"
But at another funeral on Thursday for Elsa Mendoza, a Juarez elementary school principal killed in the El Paso attack, her brother couldn't help but draw a line between the killing of his sister and Trump's rhetoric.