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ST. PAUL, MN - JULY 07: A couple hold a sign protesting the killing of Philando Castile outside the Governor's Mansion on July 7, 2016 in St. Paul, Minnesota. Castile was shot and killed the previous night by a police officer in Falcon Heights, MN. (Photo by Stephen Maturen/Getty Images)
ST. PAUL, MN - JULY 07: A couple hold a sign protesting the killing of Philando Castile outside the Governor's Mansion on July 7, 2016 in St. Paul, Minnesota. Castile was shot and killed the previous night by a police officer in Falcon Heights, MN. (Photo by Stephen Maturen/Getty Images)

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    Police chief: Officers gave Philando Castile CPR

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Police chief: Officers gave Philando Castile CPR

Roseville Police Chief Rick Mathwig claims that Philando Castile, the black man who was fatally shot by police during a traffic stop, received medical attention at the scene of the shooting.

Police chief: Officers gave Philando Castile CPR

Roseville Police Chief Rick Mathwig claims that Philando Castile, the black man who was fatally shot by police during a traffic stop, received medical attention at the scene of the shooting.