It links to this commentary which is much more interesting to read https://www.atlanticcouncil.org/blogs/ukrainealert/how-kolom...
Looks like the claim is that they misappropriated clients funds and invested it in USA under companies whose control can be linked back to them.
I am somewhat puzzled how this could fly under the radar of US banks... this is much bigger deal than the recent Danske Bank scandal in Estonia.