6-7 DIGIT $ SCAM(INVESTMENT) with 40+ people involved.

Lawyers of Reddit, we need your advice:

I've been involved in a (now seemingly) investment scheme. A short back story: a former "Wallstreet" trading began making class, a FB group, daily streams, books... For years and years. Last year he decided on the idea to make a share account(50/50 split on profit) . He claimed it had 2.5m or so in assets with many people putting in 5k-10k+ (he had min) all in all the trust was there, afterall many of the people were in his alerts making money, livestreams learning stuff and more. There were a few updates about multiple "shared" accounts and all seemed well. Until some "life" issues came up. Account showed a negative amount but the idea was if wanted to wait, would carry on to next year (2025). End of year comes up and ZERO updates, no response to anyone. Now the FB page is hacked and hidden and his main profile is down too. What's the first step in taking action. He had a (non current) broker license that was suspended (I know big red flag now that we found it). Anything we can do... Or anyone wanting to help?