That's all well and good, but statistical anomalies and potential personal ties to insiders don't prove cases, especially criminal cases. Unless they have the actual texts from whatever "encrypted messaging apps" they were using, they won't people to prove these allegations. If you could go to jail merely for being suspiciously lucky in the markets while knowing corporate insiders, lots of hedge fund managers would be in prison right now.
Correct. That is why they use this circumstantial evidence to get a search warrant to confiscate your phone and other devices, read your email and other messages, and then question you until you, or one of your co-conspirators, breaks.
...which includes lying to you and telling you that the other parties have already confessed, and that you'll be the one holding the bag in jail if you don't confess as well.
A few hours of this, and unless you have the foresight and tenacity to demand a lawyer, most people break. Only one of them needed to break in this case.
