He has been witness to a terrible murder.

他目击了一起残忍的凶杀事件。

《牛津词典》

The cops found a man they know was a witness to the murder.

警察找到了一个人，他们知道他是一起谋杀案的目击者。

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It ended with a hung jury, in large part due to the star alibi witness, a manager at the zoo who said she was having drinks with Mr Hankton at a hotel when the murder occurred.

出现这一结果，很大程度上缘于汉克顿先生的一条重要不在场证据。提供这一证据的证人是一位动物园经理。

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The only other witness to the murder described the killer as 6 inches taller and with a darker complexion than Mr. Lopez.

WSJ: Accused Killer Leaves Prison After 23Years

There has been speculation in the Russian press that Mr Gorbuntsov was a witness to the murder attempt on Alexander Antonov in 2009.

BBC: Building on Byng Street where Mr Gorbuntsov was shot

Last October John Matthews, owner of the Jazz Daiquiri Lounge on South Claiborne and a witness to the first murder, was shot 17 times in his own house.

ECONOMIST: A murderer sows terror, even from jail