Trayvon Martin's parents to join Miami rally

The parents of a Florida teenager who was shot and killed by a neighborhood watch volunteer are expected to join civil rights and political leaders at a rally in Miami.

The rally comes a day after thousands marched through Sanford, the Florida town where 17-year-old Trayvon Martin was shot and killed in February. Protesters say they will continue holding marches and rallies until an arrest is made.

Martin was shot by 28-year-old George Zimmerman as he walked back to his father's fiancee's home in a gated community outside Orlando. Zimmerman said the teen looked suspicious and that he shot him in self-defense after her and Martin fought.

Sunday's protest is scheduled to begin at 4 p.m. It is being organized by Rep. Frederica Wilson.