Since then, about 75 search and rescue workers from three counties have scoured the surrounding area. They were joined by K-9 teams and volunteers in a 14-hour search beginning late Saturday morning, and continued nonstop since 7 a.m. on Sunday.
The arm-to-arm search has covered a half-mile radius of Shannon's home, and deputies are expanding the area each hour.
Shannon was described as 2 feet tall and 11 pounds, with brown hair and blue eyes.
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