Kokosing Construction's preliminary internal investigations have detected an engineering error that may have contributed to the collapse of the Hopple Street Ramp Bridge and the death of Brandon Carl, according to a Feb. 13 statement.

CEO William Brian Burgett apologized and said that the contractor has hired Jaansen & Spaans to design all future bridge-demolition plans in close collaboration with Kokosing staff, and shared its findings with the Ohio Dept. of Transportation and the Occupational Safety and Health Administration, which are conducting ongoing investigations as well. "All of us are deeply troubled by these findings," said Burgett.