When you state 'Police brutality doesn't exist in this country' what country are you referring to exactly. England, the UK, or the EU ?
If you want to encompass N.ireland then I would have to disagree with you , as I've seen brutality first hand on many occasions, and usually involving innocent people. Both by the RUC and the PSNI.
But, if you want to think that N.Ireland is a seperate entity, not part of the Police authority of Wales/England (whic is totally correct) then your statement may be true - I don't really know as I haven't been there to see it. But, as it goes, there is Brutality caused by members of law enforcement in Britain and the UK.