I don't think Westerfield spilled the information. The body was found by a couple of van Dam Search Team volunteers. If the body had been referenced by SDLE. They would have descended on the area, well before the press arrived. The volunteers called Sheriffs around 2:00 P.M. Only then did SDLE beat a trail to the area. So that would imply that Westerfield gave up noting. IMHO.
FresnoDA