DangerMan, the "urban superhero," stopped by to support Trayvon Martin.

DOWNTOWN LOS ANGELES — Demonstrators gathered at Pershing Square on Monday in support of justice for 17-year-old Trayvon Martin, who was shot and killed by a neighborhood watch captain as the teen was walking home from a convenience store with an iced tea and a bag of skittles.

Protesters trickled into Pershing Square beginning at 4 p.m. for the second Martin rally to take place in Downtown this month. By 5 p.m., hundreds had gathered and were holding signs that said "We are Trayvon" and "Justice for Trayvons." Demonstrators explained that Trayvon was made plural because he represented multiple victims of racial violence, such as Oscar Grant who was killed on a train platform in Oakland and Kendrec McDade, who was shot and killed by police in Pasadena only a few weeks ago.

Local soul and gospel radio station KJLH was at yesterday's protest, blasting music through the square and working with organizers, musicians and politicians as they spoke about the need for justice for Martin. Although the teenager was killed by George Zimmerman last month -- the Florida man still hasn't been arrested because of the "Stand Your Ground" law, according to police.

The Downtown rally came on the heels of the announcement that Zimmerman's case will not be sent to a grand jury. Instead, Florida special prosecutor Angela Corey will decide whether or not to charge the neighborhood watch captain.