一个警方人士说这个案子仅仅是冰山一角。

A police source said the case was "just the tip of the iceberg".

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一位不愿透露姓名的警方人士表示，其中一名男子携带美国护照，认定他是帕特里克·艾伦·劳威尔。

Speaking on condition of anonymity, the police source said one of the men was carrying a U. S. passport that identified him as Patrick Alan Lawwill.

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警方人士强调，火力支援警员从事着一份非常危险的工作，执法圈子以外的人对他们工作的细节和其中的危险知之甚少。

Police insiders stress that firearms officers have a highly dangerous job, the risks and realities of which are little understood outside law enforcement circles.

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