We've been here before: Black man, police, fatal shooting, cell phone video, social media outrage. It's happened again, this time in Louisiana and Minnesota. The feds are investigating the death of Alton Sterling
in Baton Rouge, Louisiana. Sterling, who sold CDs and DVDs outside a convenience store, was shot and killed after an encounter with two officers who were on top of him. In Falcon Heights, Minnesota, a woman live-streamed on Facebook after her boyfriend, Philando Castile
, was shot dead by police after being pulled over in a traffic stop. State officials are investigating Castile's shooting death.