The Walmart manager who allegedly shot and killed six people Tuesday night “legally” purchased the pistol that was used in the attack.

The New York Times reports that 31-year-old Walmart manager Andre Bing acquired a 9mm pistol “legally” on the day of the attack.

City of Chesapeake officials noted that Bing had “no criminal history” to prevent him from passing a background check for a gun purchase.

Bing left behind a “death note,” which the City of Chesapeake posted to Twitter. In the note, he said that he had overheard other Walmart employees making fun of him and claimed, “[Walmart] associates gave me twisted grins, mocked me and laughed at me and celebrated my downfall on the last day. That’s why they suffer the same fate as me.”

Breitbart News notes that the gunman who allegedly opened fire in Colorado Springs’ Club Q acquired his firearms “legally” as well.

In fact, nearly every high-profile mass attacker for the past 16 years “legally” acquired the firearms used in those attacks.

Here is a short list of some of the attackers who acquired their firearms “legally”:

AWR Hawkins is an award-winning Second Amendment columnist for Breitbart News and the writer/curator of Down Range with AWR Hawkinsa weekly newsletter focused on all things Second Amendment, also for Breitbart News. He is the political analyst for Armed American Radio and a Turning Point USA Ambassador. AWR Hawkins holds a PhD in Military History with a focus on the Vietnam War (brown water navy), U.S. Navy since Inception, the Civil War, and Early Modern Europe. Follow him on Instagram: @awr_hawkins. You can sign up to get Down Range at breitbart.com/downrange. Reach him directly at awrhawkins@breitbart.com.