A demonstrator holds up a sign during a rally to call for justice in the murder of Trayvon Martin at Leimert Park in Los Angeles

 
A demonstrator holds up a sign during a rally to call for justice in the murder of Trayvon Martin at Leimert Park in Los Angeles
A demonstrator holds up a sign during a rally to call for justice in the murder of Trayvon Martin at Leimert Park in Los Angeles, California, March 22, 2012. Florida Governor Rick Scott appointed a task force on Thursday to investigate the shooting death of unarmed black teenager Martin as calls grew for charges to be filed against George Zimmerman, the neighborhood watch volunteer who killed him. Also, the state prosecutor who had been handling the investigation will step aside from the probe, Scott said in a statement. REUTERS/Jonathan Alcorn (UNITED STATES - Tags: POLITICS CIVIL UNREST CRIME LAW)