In 2005 the AFP were passed a secret recording of a man discussing the collection, from Sydney Airport, of the marijuana which was found in Schapelle Corby's bag in Bali.
They hid it. They buried it. They pretended that it did not exist.
They not only did this whilst Schapelle was being destroyed in Indonesia, but they did it whilst the man in question was fighting the media after they had damned his claims and presented him as a liar.