这份新指导意见出台之前，曾发生过几起车辆拦截以枪击事件告终的情况。
The new guidance comes after several vehicle stops ended in shootings.
据熟悉这一变动的人士透露，美国移民和海关执法局（U.S. Immigration and Customs Enforcement）正在更改其关于哪些官员可以拦截车辆以及拦截时须采取哪些要求的政策。
U.S. Immigration and Customs Enforcement is changing its policy on which officers can stop vehicles, and what is required to do when they're stopped, according to sources familiar with the change.
知情人士称，本周已向官员发布了正式指导意见。此前，几起备受瞩目的车辆拦截事件最终以枪击告终。
Formal guidance was issued to officers this week, sources said. This comes after several high-profile vehicle stops ended in shootings.
知情人士透露，只有完成了相关培训的ICE执法与遣返行动局（Enforcement and Removal Operations）官员才能参与拦截，并表示其他未接受适当培训的人员只能提供协助，而不能担任拦截行动的主负责官员。
Only those ICE Enforcement and Removal Operations officers who have completed the relevant training may participate in the stops, according to the sources, who said others who aren't properly trained could only offer assistance, but not be the main officer in charge of the stop.
此外，知情人士称，只有那些政府分配的车辆上配备警灯和警报器的官员才被允许拦截汽车。
In addition, only officers that have lights and sirens on their government-issued vehicles are allowed to stop cars, according to the sources.
今年初夏，在连续发生两起致命枪击事件（分别在得克萨斯州和缅因州）之后，国土安全部部长马克韦恩·穆林（Markwayne Mullin）暂停了交通拦截，因为ICE官员当时将接受新的培训。
Earlier this summer, in the wake of two back-to-back fatal shootings -- one in Texas and one in Maine -- Department of Homeland Security Secretary Markwayne Mullin temporarily paused traffic stops as ICE officers were set to receive new training.
然而，据当时的多个消息来源称，总统唐纳德·特朗普和其他人对此次暂停据信感到愤怒，特朗普随后推翻了该决定。知情人士称，新的指导意见并未禁止车辆拦截。
However, President Donald Trump and others were reportedly furious about the pause, and Trump later overturned it, according to multiple sources at the time. The new guidance doesn't prohibit vehicle stops, according to sources.
美国广播公司新闻（ABC News）已就新政策联系国土安全部以获取置评。这些新变化最早由美国有线电视新闻网（CNN）报道。
ABC News has reached out to DHS for comment on the new policy. The new changes were first reported by CNN.
上个月，在得克萨斯州奥斯汀市，一名为DoorDash送货的委内瑞拉移民被一名ICE官员枪击。
Last month, A Venezuelan migrant delivering for DoorDash was shot by an ICE officer in Austin, Texas.
威尔伯·拉斐尔·加尔塞斯-佩雷斯（Wilber Rafael Garces-Perez）已被指控袭击、抗拒和阻碍联邦官员。
Wilber Rafael Garces-Perez has been charged with assaulting, resisting and impeding a federal officer.
刑事起诉书称，在一次交通检查中，移民官员要求威尔伯·加尔塞斯-佩雷斯“将车辆停好并下车”，但他据称无视了这些命令。
The criminal complaint alleges that during a traffic stop, immigration officers asked Wilber Garces-Perez "to place his vehicle in park and step out--orders which he allegedly ignored."
起诉书还指出，加尔塞斯-佩雷斯随后与执法人员展开了高速追逐；最终有一名执法人员追上了他，而他试图用汽车撞击该执法人员，导致执法人员开枪射击。
The complaint alleges Garces-Perez led them on a high-speed chase before one of the officers "caught up to Garces-Perez, who allegedly attempted to strike the officer with his car, causing the officer to fire his pistol."
加尔塞斯-佩雷斯的律师表示，他的背部至今仍有一颗子弹未取出。
Attorneys for Garces-Perez said he still has a bullet lodged in his back.