An Oklahoma erosion-control construction firm and a top executive are the latest to be targeted in an ongoing federal antitrust investigation of bid-rigging on highway projects across the state. A federal grand jury in Oklahoma City indicted Sioux Erosion Control Inc., company Vice President BG Biscoe and another employee in an alleged price-fixing conspiracy that targeted more than $100 million in state transportation contracts over nearly six years.

Court documents unsealed in early August allege that the Weatherford-Okla.-based contractor, Biscoe and another employee, Randall Shelton, conspired with others in the erosion-control sector to raise and maintain prices during the period from about September 2017 through April 2023.