Uh,could it possibly be because his, now former attorneys said, "for those in a late easter egg hunt that are looking for Mr. Zimmerman in Florida, don't waste your time, look much, much farther away."
because there are crazy people hunting him down to kill him.
There is a bounty on his head because people have decided he is guilty based on the poor media coverage of an event that no one really knows the facts of yet.
Didn't you hear, Lee Harvey Oswald came in his UFO, picked him up, and took him back to Bermuda where he lives with Oswald, Elvis, black Micheal Jackson, and Amelia Earhart.