In Florida, a six-person jury in the trial of a neighbourhood watchman, who shot and killed an unarmed black teenager, have found him not guilty.
George Zimmerman's lawyers had argued he acted in self-defence in the death of 17-year-old Trayvon Martin.
The case sparked protests across the US over perceived bias in the criminal justice system.
There have already been demonstrations following the verdict in cities across the US.
The Martin family's lawyer is Benjamin Crump.
