Marilyn Morales (L) helps her five-year-old daughter lay flowers at a memorial before a candlelight vigil for Trayvon Martin in Sanford, Florida March 25, 2012. Martin, 17, was shot dead on February 26 after George Zimmerman, 28, a white Hispanic neighborhood watch captain, believed the young man walking through the gated community in a hoodie looked suspicious. Zimmerman followed him and an altercation ensued. Zimmerman has said he was acting in self-defense. He has not been arrested, though state and federal authorities are investigating. REUTERS/David Manning (UNITED STATES – Tags: CIVIL UNREST CRIME LAW SOCIETY)