Hi OP
People find it hard to fathom that others have different experiences to them, especially where prejudice may be at play.
Hence, the what did you do questions!
If this happened as you say, it is very important that you report him. This data will help to identify and build up a profile of those officers that abuse their power.
It's interesting. A large proportion of this board would be able to see the hypocrisy in a rape/victim balling scenario, but can not possibly do it when race is the defining factor..... Queue the series of posts that will offer all the possible scenario's, most of which will be a lot more imaginative than accepting an officer could just be being racist - something people of colour almost unilaterally have no issue with recognising and believing because of their learnt experience.
Camera phones, not respecting and believing other human beings, has been the only thing that has changed this in America. Yet holding racists to account before victim blaming as standard still has some way to go.
If thats what you felt, don't doubt yourself. Especially, by prioritising the assumptions of those that don't even have the wisdom to see that their lived experience doesn't actually qualify them to be expert, or even moderately as knowledgeable on this subject.
If they were invested in trying to understand your truth, as much as they are in trying to support the idea that racism couldn't have possibly existed (like minorities don't report this ALL the time) then posters would have been flooding in to at least ask you 'why' you feel the way you do!
I believe you OP. I believe its a lot more likely that you have experienced this than it is for an individual to randomly come on a forum of largely white users to fabricate a story of police racism.
I have no problem with believing peoples accounts, just as I would in a rape case, and I don't victim blame as standard - ironically a term I learnt on Mumsnet many years ago.
Don't doubt yourself.