2 sentences

1. 据调查，是他幕后主谋了这场政变。

   jù diào​chá, shì tā mù​hòu zhǔ​móu le zhè cháng zhèng​biàn.

   According to the investigation, he was the one who masterminded the coup behind the scenes.

   Source: Dong Chinese Dictionary

2. 经过深入调查，警方终于抓住了藏在幕后的犯罪主谋。

   jīng​guò shēn​rù diào​chá, jǐng​fāng zhōng​yú zhuā​zhù le cáng zài mù​hòu de fàn​zuì zhǔ​móu.

   After a thorough investigation, the police finally caught the criminal mastermind behind the scenes.

   Source: Dong Chinese Dictionary