Created: 7/19/2008 4:39:55 PM 
ORLANDO, FL (AP) -- Authorities are working on dozens of tips in their search for a missing 2-year-old central Florida girl.
Orange County Sheriff's officials say Caylee Marie Anthony mysteriously vanished more than a month ago.
Her mother, 22-year-old Casey Marie Anthony, was arrested after she went to police this week to report the disappearance.
She's charged with child neglect and criminal obstruction.
Officials say the woman told detectives she had dropped off her daughter at a baby sitter last month but hadn't seen her since.
The charging affidavit says the mother didn't call authorities immediately because she was conducting her own investigation.
On Friday, authorities used cadaver-sniffing dogs to search in the back yard of a home belonging to the woman's parents.
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