This black junk on the ground would have been detectable in the soil had the forensics team done soil tests.
"also after a few days things like hair will pull out quite easily"
Mouser, clumps of her hair were found in the surrounding vegitation, so in fact some of her hair did indeed come out.
"limbs can come off"
Yes, this is true, but with a smaller corpse, this does not always happen, especially in warmer, dryer climates.
internal organs ares the first thing scavangers go for
Yes, this is correct also, but they rarely go after a foot for obvious reasons.