From giagreen's article above (thanks for the link!):
http://www.mountainlion.org/CAL_ch4.asp
"Following a successful kill, cats rarely feed immediately.(13) This characteristic is probably a response to the level of hunger, energy expended during the attack, and the excitement of the attack. At some point, though, the cougar will drag or carry the carcass to a protected spot, such as under a tree, and begin to feed.(38) The cougar's instinct to hide its kill is strong. After eating its fill, the cougar will hide the carcass by covering it with pine needles, limbs, and small twigs. Hiding the carcass protects it from scavengers, such as coyotes and ravens, and keeps the meat cool and fresh. Using its claws as rakes, the cat will stand over the kill and drag the debris inward with its front feet. Even soil and small rocks are used when nothing else is available. Shaw once found a deer killed on a large granite boulder in Arizona by a radio-collared lion. The female cougar had placed a single twig on the carcass before leaving.(38)
The cougar will typically remain in the vicinity of its kill for up to five days, making frequent trips back to feed and protect the carcass from other carnivores and scavengers. It's not uncommon for a lion to move the carcass after each feeding. Fred Lindzey reports that lions will sometimes move a carcass over 100 yards each time, then feed on it.(9) How long the cat remains with the kill and the degree to which it is consumed depends on the size and weight of the cougar, the size of the prey, and weather conditions.(38)"
A hidden body would not be seen by helicopter. Heartbreaking.
Now, if they would just release the DNA results on the hair(s)!!!