記事内の引用について
Standoff at Honolulu hotel ends as armed man kills himself, police say(CNN)より
https://edition.cnn.com/2021/04/11/us/kahala-hotel-shooting-hawaii/index.html
Police say man shot himself after hours-long barricade situation in Kahala Hotel and Resort room(khon2)より
https://www.khon2.com/local-news/police-say-man-shot-himself-after-hours-long-barricade-situation-in-kahala-hotel-and-resort-room/
Firearms - Apply for a Permit(ホノルル警察)より
https://www.honolulupd.org/information/firearms/
Firearm Mortality by State(アメリカ疾病予防管理センター)より
https://www.cdc.gov/nchs/pressroom/sosmap/firearm_mortality/firearm.htm
日本の銃器情勢(警視庁WEBサイト)より
https://www.npa.go.jp/bureau/sosikihanzai/yakubutujyuki/jyuki/jousei/R02juukizyousei.pdf