According to this news Atomic wallet team is based in Kazakhstan and they are going to have a lot of problem with their law enforcement agency.
They say that they are from Estonia and are cooperating with the authorities of their country, who are also involved in solving this crime. Investigators from Elliptic have found a link to the North Korean hackers from Lazarus Group. Thanks to tracking, $1 million of the stolen goods were frozen. It looks like Chainalysis will be joining the investigation as well.
But there is still no answer to the question why the developers still have not closed access to the compromised wallet, since they still do not have all the answers about the hack.