破解凶案! Fitbit智能手环心率数据立功!

Fitbit data has been used by US police investigating whether a 90-year-old murdered his stepdaughter.

日前，美国警方通过利用Fitbit手环的数据，调查了一名90岁的男子是否杀害了自己的继女。

The victim, Karen Navarra, 67, was found with a kitchen knife in her hand, suggesting she killed herself.

受害者凯伦·纳瓦拉，今年67岁，被发现的时候手中握着一把厨房用刀，营造出自杀的情景。

Anthony Aiello, who denies murder, told police he had visited her for 15 minutes to drop off pizza.

安东尼·艾洛否认了谋杀，他告诉警察自己是来看望纳瓦拉，在她家呆了15分钟，还给她带来了披萨。

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But police say a fitness tracker she was wearing showed a significant spike in heart rate followed by a rapid slowdown at the time he was there.

但警方发现，纳瓦拉佩戴的健身追踪器显示，在艾洛在现场的那段时间，纳瓦拉的心率明显提高，然后又迅速下降。

According to a police statement obtained by USA Today, Ms Navarra's Fitbit Alta device showed a raised heart rate at about 15:20 local time, when video evidence suggested Mr Aiello's car was at her house.

根据《今日美国》获得的一份警方声明显示，当地时间15:20分，纳瓦拉的Fitbit智能手环显示她心跳加速，而视频证据显示，艾洛的车当时就停在纳瓦拉家。

It then recorded her heart rate slowing rapidly and stopping at 15:28, five minutes before he left.

在艾洛离开的五分钟前，Fitbit智能手环的记录显示她的心率迅速下降，并在15：28分完全停止。