"The caller is advising the child's leg was bitten," an emergency dispatcher said in a radio transmission to firefighters. "It's still attached. Rangers are with her."
The Florida Fish and Wildlife Conservation Commission completed its review of the area Monday.
FWC contractor George Walrath, who captured and killed the alligator, said he has already caught 38 animals in the past week.
Walrath said he typically traps 100 gators a month, but it's the height of breeding season for the massive reptiles.
An FWC spokesman said the agency found no wrongdoing on the part of the county.
It's now up to the county to decide when to reopen the beach. Officials didn't say whether other parks would be closed.