In the event of a raid, you are only obliged to provide information about yourself (name, date of birth, place of birth and current address).
The immigration status of migrants is also checked (ideally you have your passport with you). You have the right to an interpreter. Do not sign anything misunderstood. You don't have to make a statement. Better make all statements about the thing or money in the presence of a lawyer. If you have any problems, have your name or service number given so that you can also assign the person to the respective control authorities.