Vice Chancellor J. Travis Laster on Monday panned as “not credible” William I. Koch’s attempts to avoid turning over documents in a pitched battle over the future of Koch’s Oxbow Carbon and ordered the billionaire to produce surveillance records and other information to minority investors fighting to sell their holdings.

The ruling was the latest in a messy case that appears to be careening toward a possible trial later this year. Koch, the CEO and controlling stakeholder in the West Palm Beach, Florida-based company, in June 2016 accused a group associated with Crestview Partners of improperly trying to force him out of Oxbow in order to force a quick sale of the company as commodities prices tanked.