Don't think that when they tell you it's just to assist with the investigation, you can say anything. You could go from being an investigator to a suspect with just one more phrase: 'I was a bit suspicious at the time.' When the police ask you, 'Did you check the source of funds when selling USDT?', you can only say, 'I did check, he said it was legal income, I really didn't know there was a problem.' Believe it or not, one more word and you won't get out today.
Making a statement is absolutely not just going through the motions. Today, let's talk about what details you need to pay attention to when the police call you in to make a statement. How deep is the water, really?