He would never admit to it affecting him, and of course it would cost him his job if he announced he was jumpy around black people. I am stating is it is human nature(basic survival skills) to let past events affect the way you handle future circumstances. If you do not do this, well you lack basic survival skills and won't last long anyways (if you are in a position where your life is repeatedly in danger). I personally know 2 white cops who were murdered in cold blood (before this BLM mess) by black people. They only made local news. One was shot while trying to arrest someone, he was pursueing a young black man and when the young man reached behind him... he did not shoot, so he my friend is now dead. One was sitting in his car and a black man walked up and shot him in the head.
Cops are not eager to kill people. However, they want to stay alive. You said you are from the UK. you guys ended slavely earlier than we did and did a much much better job of intergrating former slaves into society than my ancestors did. My generation is now paying for their mistakes.
If you are "jumpy" around black people, you should do the right thing as a police officer and turn in your badge and gun.
A black person doesn't deserve to be put into a position where your "jumpiness" or bias (justified or not) could cost them their life because of a misunderstanding.
If you are "jumpy" around an entire large racial group, you aren't fit to be a police officer.
I'm sorry if that's harsh, however the police are *public* servants, they are accountable to the public, it is not the public's job to put them at ease.
If you cannot ensure public safety because of some bias/issue you have you are not fit in high pressure situations where a mistake you make could mean death for someone else, in the same way a pilot who has an issue with say vertigo or is "jumpy" in tight spaces shouldn't be flying a freaking air craft.