1.Since death ahs occured the vehiclewill reiaj seiziedforsometimetocomplete forensic orother teststo be amde.
2.After sometimes OR after submission of the sheet when investigation would be completed you can apply for release of the car.
3.In this RTO has nothing to do to realise the vehicle.
4.You will have to apply to the Magistrate and if it thinks that the vehicles is no more required for further investigation ti would allow its release on adequate bond from your end.