Did Russians try to exploit Philando Castile shooting protests? Report suggests yes

Valerie Castile, center, the mother of Philando Castile, joins other marchers during a rally in front of the Governors Residence in St. Paul on Thursday, July 7, 2016. Hundreds of demonstrators marched to the front of the Governors Residence to protest the slaying of Philando Castile, who was fatally shot by a St. Anthony police officer during a traffic stop in Falcon Heights, Minn., the night before.