The correct answer to this open question is the following.
Your question is incomplete. It is not a "AA" abbreviation. That is wrong. The correct abbreviation is CIAA. This stands for The Commission for the Investigation of Abuse of Authority. It is an official commission in the country of Nepal.
Now, with that clarification, we can say the following
CIAA has been established as a constitutional organ to check corruption but corruption is still increasing day by day instead of decreasing. The reason why is that in these kinds of underdeveloped countries, corruption is so ingrained in all public and government institutions because, through the passage of time, many political and economic interests have been creating a "mafia" of power in which most of the corrupt officials have corrupted the justice system through bravery.
CIAA has worked with minor officials but the real "heads" of this mafia are untouchable.