6 sentences

1. 警察派他去那个犯罪团伙卧底。

   jǐng​chá pài tā qù nà gè fàn​zuì tuán​huǒ wò​dǐ.

   The police sent him to go undercover in that criminal gang.

   Source: Dong Chinese Dictionary

2. 警方成功打掉了一个跨国犯罪团伙。

   jǐng​fāng chéng​gōng dǎ​diào le yī gè kuà​guó fàn​zuì tuán​huǒ.

   The police successfully busted a transnational criminal ring.

   Source: Dong Chinese Dictionary

3. 警察在那个犯罪团伙里安插了眼线。

   jǐng​chá zài nà​gè fàn​zuì tuán​huǒ lǐ ān​chā le yǎn​xiàn.

   The police planted an informant within that criminal gang.

   Source: Dong Chinese Dictionary

4. 警方成功抓获了该犯罪团伙的头目。

   jǐng​fāng chéng​gōng zhuā​huò le gāi fàn​zuì tuán​huǒ de tóu​mù.

   The police successfully captured the leader of the criminal gang.

   Source: Dong Chinese Dictionary

5. 为了躲避警方的追捕，这个犯罪团伙销声匿迹了整整一年。

   wèi​le duǒ​bì jǐng​fāng de zhuī​bǔ, zhè​ge fàn​zuì tuán​huǒ xiāo​shēng​nì​jì le zhěng​zhěng yī nián.

   To evade police pursuit, the criminal gang vanished without a trace for a whole year.

   Source: Dong Chinese Dictionary

6. 那个犯罪团伙在半夜绑架了人质，并向其家属索要巨额赎金。

   nà​gè fàn​zuì tuán​huǒ zài bàn​yè bǎng​jià le rén​zhì, bìng xiàng qí jiā​shǔ suǒ​yào jù'é shú​jīn.

   The criminal gang kidnapped the hostage in the middle of the night and demanded a huge ransom from the family.

   Source: Dong Chinese Dictionary