Thousands rallied on the steps of the Georgia state Capitol in memory of the unarmed 17-year-old killed by a Florida neighborhood watch captain while returning from a convenience store.
Civil rights groups, students and public officials called Monday for an end to stand-your-ground laws, which some believe could lead to a similar incident in Georgia. The crowd spilled into the street, snarling rush hour traffic downtown.
Trayvon Martin was shot Feb. 26 by neighborhood watch volunteer Zimmerman, a 28-year-old who said he was acting in self-defense and hasn't been arrested. The unarmed Martin was returning from a convenience store when the shooting happened.
The crowd at Atlanta's rally chanted "I am Trayvon!" and "Arrest Zimmerman now!"
Some black lawmakers in attendance vowed to introduce legislation to repeal Georgia's stand-your-ground law.