George Zimmerman in custody, will be charged in Trayvon Mart

Authorities in Sanford, Fla. — where Zimmerman, 28, a neighborhood watch volunteer, shot Martin, 17, on Feb. 26 — began preparing for public reaction to the announcement from Corey. Several counties in the region activated their emergency operations centers and were on heightened alert, NBC News' Kerry Sanders reported from Sanford, while Seminole County sheriff's deputies spent Wednesday morning setting up barricades along the booking area for new inmates at the county jail,George Zimmerman in custody, will be charged in Trayvon Martin case