is THAT corrupted

i was chatting with my indo friend and he said that Indonesia is very corrupted. he told me this report he read.

The indo govt caught this lady trying to smuggle drugs into the country. they found drugs in her bag. she claims that she didn't know anything about it.. i don't know whether she's telling the truth.
but anyway, after the found the drugs, they weighed it, and it was 4.2kg.
then a few weeks into the trial, when they weighed it again, it was 4.1kg. where did the 100g of drugs go?? hahaha, take a guess.