Candlelight vigil for Trayvon Martin held in Washington DC

Participants sign condolences at a candlelight vigil, March 26, 2012 in Washington, DC in memory of the killing of young Trayvon Martin by neighborhood watchman George Zimmerman in Sanford, Florida. The shooting has sparked a debate about Florida's Stand Your Ground self defense law, Zimmerman has not been arrested and many details remain unknown. UPI/Mike Theiler