I'm sure its in the hands of someone close to his like his wife or kids. What will happened? It's dirty money, what do you expect? It will still used to fund drugs and kill people who opposes those cartels.
I don't know how long can someone can keep that huge amount of money. Authorities will be hot on her tail, that's for sure. But just like a said, it will still be used for drugs, no doubt about it.