Who’s right???

Hello, urgently need your tips!!! We bought a used Opel Zafira almost 3 months ago. The previous owner had registered the car only one month in his name and it looks like he bought the car only for resale. Well, it’s also ok, I talked to the previous owner who sold it less to the car for 1350 euro. I only say good earnings. But in this one month the VB drove the car there was a sheet metal damage at the Motorha ube, it also starts rusting by now. Of course I intend to have it done. Now the previous owner comes to us and wants to send an expert by because the police finally found the causer of the damage. He has to keep the money from the insurance… Now my question: must I let him get the money, he will not fix the car for, the car belongs to me and the damage in that sense also, he has not made a mistake. But vice versa good profit. I see the thing so that it is meant for repair and therefore actually belongs to me at least partially… Please say whether I am right here or not. Thank you in advance!