I'm not familiar with the other case but I'd imagine the guy was arrested and tried for murder. The only reason the Martin case blew up is because Zimmerman was released on the day of the shooting; it took a public outcry to get him charged. Ultimately, the justice system disproportionately searches and incarcerated blacks at a far greater rate than white people, even when you take crime rates into account. It may not be systematic racism in the actual legislature, but it is certainly systematic racism through stereotypes of those who do work in the industry. That, and sentence handouts in the war on drugs are also disproportionately aimed at poorer people. Which is systematic targeting of poorer groups.