This information comes from a single law enforcement official.

该消息来自独立的执法官员。

One law enforcement official said dozens of leak investigations are under way.

一位负责法律实施的官员说,关于泄密的许多调查已经展开.

A federal law enforcement official says the male victim is refusing to answer questions about the incident, raising the likelihood that he knew the shooter.

一联邦法律执行官员说这名男同学拒绝回答一切与事件有关的问题，这也（删去也，文中没有这个意思）提高了他知道抢击者是谁的可能性。

A law enforcement official with knowledge of the investigation into Michael Jackson's death says the pop star's personal doctor administered the powerful drug that authorities believe killed him.

一名熟知迈克尔·杰克逊死因调查案的执法人员表示，当局认为杰克逊的私人医生所开具的强效药物杀死了这位流行歌王。