We need stronger whistle blower protections, laws and incentives. The only people who can police the police are the police. So society needs to create the situation where the incentives to police themselves reward them greater than the current corrupt, immature and racist rewards they reap today.
>>bsenft+(OP)
You can't reward someone who is in power into not being corrupt and not abusing their power. You prohibit, stop and punish them. Begging only goes so far.