Desperate search for missing 4-year-old ends in tragedy.

The search for a missing 4-year-old boy in Yellow River Park, Gwinnett County, Georgia, continues with multiple agencies involved. The child was last seen in the water, and his mother witnessed him go under. Ground crew search efforts were halted due to loss of daylight, but the crew in the air continued searching with infrared cameras. The search will resume in the morning if the child is not found overnight. The concern now is that Sunday rain could cause the river to swell and complicate things.