They're poor because they're lazy. The circular argument is used often. It isn't really an argument. The user of it hopes that by repeating the same thing in different words, it will sound like reasoning is going on when it isn't. This one involves changing premises in mid-argument.
People of color are criminals.
They should all be locked away. Don't tell me about poverty and desparation. There are plenty of people of color who suffer so-called racism and don't turn into criminals. The ones who don't are just born that way and they're a danger to the rest of us. Note here that I wouldn't have refuted the first point with the social causes of crime, but would have pointed out the absurdity of the conclusion and the premise.