I have been reading that the vast majority of people found guilty of violent crime in America are black, does this not probably have some bearing on police attitudes, no matter how well trained and impartial they are supposed to be.

Ake, two problems. Find a more comprehensive source of news - with reliable numbers. What you mis-understood in that reading is that the number of African Americans found guilty is DISPROPORTIONATE to the total number of gun cases and to the percentage of the population. White defendants are let off more often or are given less harsh punishments.

Also, you can stop bashing Hillary. She's no Margaret Thatcher.