My local police have a Facebook page which they use to update 'likers' on different issues, open days, schemes to cut crime etc. So a few days ago the update was about Halloween, basically saying to have fun dressing up and celebrating Halloween but they would be keeping an eye on things. The word 'spooks' was used, as in 'we will deal with any spooks that get out of hand' or words to that effect. Somebody commented that the post was racist, that the word 'spook' was a racist term and that he would be making a formal complaint. The post was quickly taken down and an edited version put back on about five minutes later with an apology for any offence caused.
I didn't know spook was a racist term though, I've never heard/seen it used in that context. I'm 24, is it an older slur or is it more an American term?