Over 3 dozen people arrested as potential mass shooters since white supremacist terrorist attack in El Paso
Reported survelliance video footage of the shooter who committed mass murder at an El Paso Walmart (Twitter)

Authorities have been aggressively investigating potential mass shooters since the white supremacist terrorist attack at a Walmart in El Paso, Texas.

"In the four weeks since a 21-year-old alleged white nationalist was charged in the slaughter of 22 people inside a Walmart in El Paso, Texas, law enforcement authorities have arrested more than 40 people as potential mass shooters — an average of more than one per day," the Huffington Post reported Saturday.

"A HuffPost survey of these arrests likely didn’t capture every one, but it offers a snapshot of the types of cases that law enforcement officials face in a country with easy access to weapons capable of killing a lot of people quickly. The cases range from allegations of vague social media threats from juveniles that set parents on edge to well-developed plots from people who had access to weapons and appeared to authorities to have been planning a mass murder," HuffPost revealed. "There were roughly a dozen cases involving right-wing ideology. There were at least a dozen alleged threats against schools. There were half a dozen cases involving alleged threats against Walmarts."

Patrick Crusius was arrested for the El Paso attack, which killed 22 people and injured 24. He reportedly published a right-wing manifesto on 8chan shortly before the shooting.

Read the full report, which includes background on the individual cases.