I think it would also be beneficial for that civilian committee to undergo some type of police training to better understand the situation the cop was in.One of the things I've seen regarding police reform I most agree with is the idea of a community council that is allowed to review footage of shootings with senior members of the PD.
The theory is that these influential community members (religious leaders, activists, etc) would be able to relay the perceived accuracy of the incident report, hopefully reducing the amount of people who'd be out protesting/rioting.