The Tokyo High Court on Friday sent a high-profile 2017 road rage case back to a lower court due to an illegal procedure during the original trial.

The high court upheld the ruling of the Yokohama District Court that Kazuho Ishibashi, 27, caused a crash resulting in the death of a couple and injuries to their daughters, but ordered the case to be reheard by the lower court over the issue.

The district court convicted Ishibashi of dangerous driving after he overtook the car of Yoshihisa Hagiyama, 45, and his family on the Tomei Expressway in Kanagawa Prefecture on June 5, 2017, and forced it to stop in the passing lane.