Ariyanna Pivachek had been at the party with seven other foster children and eight adults when she disappeared about 3 p.m., the Hillsborough County Sheriff's Office said. The adults initially started looking for her by themselves, then called 911 at 3:30 p.m., deputies told the Tampa Bay Times.
Deputies found the girl's body about 45 minutes later in 6 feet of water about 15 feet from shore in a small pond nearby the home she was visiting, the newspaper said.
The Sheriff's Office said the girl's foster family had been considering adopting her.
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