A federal judge has allowed a plaintiff to conduct discovery on alternate fuel-tank designs in the case of a man who burned to death in a fire caused by a fuel tank rupture on a truck manufactured by Daimler subsidiary Freightliner.

The ruling comes out of a case filed against Daimler and other defendants by Deena L. Horner, whose husband was killed when the Freightliner truck he traveled in burst into flames after being struck by two vehicles. In addition to claiming the drivers who collided with the truck were negligent, Horner alleged Daimler failed to design and install safer fuel tanks on the Freightliner truck model in which her husband was killed.