Hispanic is at most an ethnicity and even that is a stretch. Jamaicans and Haitans are mostly black and they are considered Hispanic. I am of Cuban decent and they come in every color and race including white, indian, black, mulatto and about every possible mix. Lots of Germans and other Europeans not unlike the population that settled in America immigrated to Argentina and they are considered Hispanic. I think Hispanic is supposed to have something to do with Spanish origin but Brazil was colonized by Portuguese and there were also French, Dutch and British colonies in that part of the world too. They are all called Hispanics. It is a pretty meaningless word.
I know, you're right. This was in context of what would be entered it the "race" section of an arrest warrant.