Sacramento ABC station is reporting that the incident was in Kings Canyon NP, not the NF. 10 Mile Creek. Dad and his kids were descending to the creek to check it out. Dad helped the boy onto rocks near creek, turned away to help someone else, and the boy was gone. Just like that. Clothing found downstream.
http://abclocal.go.com/kfsn/video?id=8089607#global Lead is initial report, details in third frame below.
