2 sentences

1. 我们是海军罪案调查处。

   wǒ​men shì hǎi​jūn zuì'àn diào​chá chù.

   We are the Naval Criminal Investigative Service.

   Source: OpenSubtitles

2. 警方正在调查这宗罪案。

   jǐng​fāng zhèng​zài diào​chá zhè zōng zuì'àn.

   The police are investigating this crime.

   Source: Dong Chinese Dictionary