MIAMI (AP) — Police and city leaders in Florida say they have taken precautionary steps for the possibility of mass protests or even civil unrest if George Zimmerman is acquitted in the killing of unarmed teen Trayvon Martin, particularly in African-American neighborhoods where passions run strongest over the case.

For months, officials in Sanford and South Florida have been working with pastors, youth coaches, community activists and summer camp counselors to stress a non-violent approach if Zimmerman walks free. At the same time, police say they have quietly been making plans for dealing with any potential emotional flare-ups that could quickly turn into storefront-smashing, car-burning riots.