It was a claim made by Mercer which was never proven. Mercer probably voluntarily dismissed the case when the defendants (Treaty/Blackburn) didn't give in; much like how Treaty didn't give in when the Bankruptcy petitioners tried to make outrageous claims hoping Treaty would settle. Mercer most likely realized a settlement wasn't going to happen and opted to drop the case rather than wasting money on a very costly and difficult case to prove.
Imagine if the SEC with all its money has not brought forth a case to date against Treaty for the alleged false oil claim in Belize how could you reasonably expect Mercer have a successful outcome in court?