I'm not sure of the racist aspect, that remains to be seen. What this does prove is that we have some incredibly stupid and incompetent people working in the police force carrying taser guns.
This is true, I was walking home by myself once and a car screeched up to me and two OB jumped out and one of them started shouting at me before any other interaction.
If they weren't so obnoxious I would've just told them where I'd been. Too menu of them adopt the classic bully boy mentality.