I looked into this topic again after seeing your thread and it reminded me how complicated crypto related cases can become. When the name Cristian Albeiro Carmona appears in connection with Kuailian, it usually comes up in discussions about how the project expanded across different countries.
One thing that surprised me while reading public reports is how large the community around the project seemed to be at one point. A lot of people apparently joined through referral networks, which made the ecosystem grow very quickly.
When something grows that fast it becomes difficult for regulators to monitor everything in real time. By the time questions appear publicly, many investors have already participated and are trying to figure out what actually happened behind the scenes.