Black Lives Matter is an American social justice movement which seeks to remedy the problem of extrajudicial killings of people of color by police officers among other issues. One aspect of this movement, that I found interesting was that they usually start demonstrating before the police department in question has had a chance to review the facts of the shooting and take any disciplinary or legal actions against the officer responsible.
For example, on July 6 2016, the world saw a video of Philando Castile after he was shot 4 times by a police officer. In the video, his girlfriend narrates, describing a horrific miscarriage of justice. She claims Mr. Castile was pulled over for a traffic stop and after announcing that he had a legal firearm with a concealed carry permit and reaching for his wallet, he was shot 4 times. Later that day he died. Immediately following, and in reaction to another fatal shooting, Black Lives Matter organizers set up protests throughout the country.
Meanwhile, another organization which champions the rights of concealed carry permit holders, the NRA, released a statement saying “The reports from Minnesota are troubling and must be thoroughly investigated, in the meantime, it is important for the NRA not to comment while the investigation is ongoing.”
What are the reasons the Black Lives Matter movement members use to explain why they protest while investigations are pending; rather than waiting until law enforcement has had a chance to investigate, release relevant information, and punish officers who have broken the law or violated police procedure? I understand that there is no formalized platform of the grassroots Black Lives Matter movement, but I think prominent members, organizers, or reporters who have spoken to many members will be good enough sources to get a sense of the reasoning behind this decision.