Accident-can the evaluator shut down?

Hello, I have a question, it happens this scenario: A vehicle gets into an uninsolved accident and is something demolished, jeodch for the driver not restricted driving ready. Now he goes to the expert to estimate the damage, in order to be compensated. But the vehicle owner wants to drive the vehicle unrepaired. Now the question: May/can the expert force the car to shut down (let) because he realizes that e.g. the one wheel is something wrong? Or created He only has the report and the thing is done for him? Does anyone know exactly how this is regulated?