From what I read in the article, I'd guess Carlton is looking for money already hidden outside of the UAE. Logically, if this contract also required work inside the UAE to be done by a licensed investigator, it would be far simpler for Carlton to work out a deal with a UAE licensed firm than to spend the money and waste the time needed to gain a local license. It's a newspaper article, not a detailed structural graph of all lawyers, law enforcement agencies, private investigators, and government regulators involved, and it's also likely that there could be errors. For example, they've got an error at the end about which US agency is responsible for US citizens involved.
Still, the good news is that the money trail is now being followed, so there's a chance of at least some of the money to be recovered.
Oh, and I have to ask:
Hey Bingo, Superhuman82, and all you other cheerleaders who claimed the rate of return was reasonable and the company was legitimate. What do any or all of you have to say now that Sydney Lemos is rotting in jail over this obvious Ponzi fraud?