"We took buses, trains and helicopters to get down to Florida, because there was another nationality that was against us," Alston said Sunday, referring to the Martin case. The teen was fatally shot by George Zimmerman, whose father is white and mother is Peruvian. "They've been marching. They've been doing everything. We had it right here — and nothing. He was a black cop who killed a young, black 17-year-old, and nobody says nothing."