By now, you've probably heard about the New York Times article exposing evidence of bribing officials in Mexico and attempts to sweep the whole thing under the rug. These bribes would have violated the Foreign Corrupt Practices Act (FCPA), the U.S. law that makes it illegal to bribe foreign officials. There are also connections between Walmart and organizations calling for weaker anti-bribary laws. Federal lawmakers are asking for more information on that topic
Even though the US Justice Department is investigating these allegations, it's hard to say whether justice will be served, as the alleged bribery seems to have occurred over 6 years ago and there are statutes of limitations that may prevent any indictments.
And, just for fun, you can see what Tom the Dancing Bug has to say about all this.