One construction worker was killed and a truck driver injured when a section of overpass over I-75 collapsed Monday night. Cincinnati City Manager Harry Black says they don't know yet why the section of road fell. The overpass that fell used to be the ramp from northbound 75 to Hopple Street. It had been replaced with a new overpass in the last year, and was being torn down. The investigation is now in the hands of the Ohio Department of Transportation and the federal Occupational Safety and Health Administration. They will try to determine why the bridge section collapsed, killing 35-year-old Brandon Carl of Augusta, KY. He was part of the Kokosing contracting crew demolishing the old overpass. WVXU reporter Bill Rinehart gives us an update.