首謀者を英語でなんと言うか？

ring leader, mastermind です。2:55 this was the man on the top, Shinichiro Wada, the alleged mastermind. この和田真一郎が早稲田スーフリのトップで、レイプサークルの主犯格とされている人物だ。7:06 other members of SuperFree are yet to receive a verdict, including the alleged ring leader.

https://www.youtube.com/watch?v=RkCpNCVMIBU  0:27 those who masterminded this awful crime.
https://www.youtube.com/watch?v=VOxxJYNfpZk  0:54 rising to the top to become the ring leader. ボスになるためトップに上り詰める。
https://www.youtube.com/watch?v=9ejUOBByCXs  2;52 they can certainly take steps to try to remove who they see as the ring leaders of that movement. 香港の警察は首謀者と見られる者は拘束できる。
https://www.youtube.com/watch?v=fDRuoQno8QI  0:54 one of the ring leaders
https://www.youtube.com/watch?v=YyGxZh7rNgE  0;50 he was a ring leader.
https://www.youtube.com/watch?v=6gTzMWpA6ow  0:15 he is the ring leader of this organization.

参考リンク
https://www.youtube.com/watch?v=uvdO0TJXjdc  1:07 they all try to get you drunk and they just like take advantage of you. あいつらはあんたをべろべろに酔っ払わせて、それから犯すのよ。
Preview: Marketplace investigates high school grad trips

練習問題解答
a-1363 ring leader
a-6005 the mastermind behind
a-7365 the ringleader of the college admission scam 注；ring leader と no one のように二単語で一単語と思っていましたが、ringleader 一単語です。