In case after case, they said, the police insisted on waiting 24 hours before taking action, and then claimed that too much time had passed to mount an effective investigation.

每个案子警方都说采取行动前必须等上24小时，后来却又宣布调查的有效时机已经过去。

youdao

Subsequently, the Mexican police after an investigation found that the amount of cash stolen is much higher than the previously released 157 million pesos.

随后，墨西哥警方经过调查发现，被抢的现金数额远高于之前公布的1.57亿比索。

youdao

After much investigation, the reporters linked the Watergate break-in to President Nixon and his top advisers.

VOA: special.2009.04.26

Prosecutors began the formal investigation after police decided that a voice on a tape recording heard acknowledging as much was probably his.

CNN: French budget minister resigns

After identifying the top three to four aircraft, we begin a deeper investigation, which takes a much closer look at aircraft condition and verification of all specifications.

FORBES: What's The Best Jet For You? (Part 3)