Hello, as everyone can see, a lot of ICO's price dropped significantly and founders are not delivering anything, because they don't care. People lost their money and hope.
Is there a way to get investors money back by involving government and police?
What if collective group of investors opens a lawsuit similar like is happening now with Tezos?
Well, some developers or CEOs of some projects might not be sincere with their dealings with investors.
Then it is also very essential that you do your own research before joining or investing into any project.
Then i do not think there is any body available to regulate the activities of ICOs, except you are dealing with STOs.
Another opportunity is if you know the country of residence of the project, then you can report to the government there, if they are ready to tale it up.