"INSTITUTE, W.Va. -- Bayer CropScience managers knew methyl isocyanate monitors were broken last August when they restarted a pesticide unit where up to 37,000 pounds of the deadly chemical are stored, company officials have confirmed.

Bayer officials have repeatedly issued statements saying that no MIC was released during the Aug. 18, 2008, explosion and fire that killed two workers.

But during an interview last week, plant officials were unable to explain exactly how they knew that to be true."

Ken Ward Jr. reports for the Charleston Gazette May 10, 2009.