It is his job to bring the murderer to justice.

他的职责就是将杀犯捉拿归案。

As no one was ever convicted of the murders, it is widely believed that there may have been a conspiracy of silence maintained by the victims’ friends and families.

兇手始终没有归案，所普遍认为受害者的亲友达成保持缄默的协议。