巴西联邦警察局负责内部事务的官员贵马拉斯说：“现在的结论是，这是一个只有她才能澄清的谜团。”

"The conclusion is that it is a mystery that only she can clear up, " Francisco Assis Guimaraes, a federal police official of the internal affairs division, told reporters.

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在他早上9点15分走入Southwick警察局之前不久，Ann R. Israel通知联邦警察局她48岁的儿子计划自首。

Shortly before he walked into the Southwick police station at 9:15 a.m., Ann R. Israel informed United States marshals that her 48-year-old son planned to surrender.

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美国联邦调查局(FBI)和伦敦警察局平均每年各自调查不到100起雇凶杀人案件。

The FBI and London metropolitan police each investigate fewer than 100 contract killings per year, on average.

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