3 sentences

1. 他捏造事实，企图误导调查人员。

   tā niē​zào shì​shí, qǐ​tú wù​dǎo diào​chá rén​yuán.

   He fabricated facts in an attempt to mislead the investigators.

   Source: Dong Chinese Dictionary

2. 调查人员正在核实事故现场的实况。

   diào​chá rén​yuán zhèng​zài hé​shí shì​gù xiàn​chǎng de shí​kuàng.

   Investigators are verifying the actual situation at the scene of the accident.

   Source: Dong Chinese Dictionary

3. 调查人员发现，有人故意泄漏了那份机密报告。

   diào​chá rén​yuán fā​xiàn, yǒu rén gù​yì xiè​lòu le nà fèn jī​mì bào​gào.

   Investigators found that someone had intentionally leaked the confidential report.

   Source: Dong Chinese Dictionary