CBS Local | Toxic vapors suspected in deaths of three Colorado oil and gas workers The Denver Post Joe Ray Sherman's death on a Weld County oil patch last year was tragic but not entirely unexpected. The 51-year-old was diabetic and suffered heart problems. The native Texan moved to Colorado 20 years ago in hopes that the clear, mountain air would ... 9 Oil Well Deaths Lead to Warning About Inhaling Chemicals 9 Deaths Lead To Warning About Inhaling Chemicals At Oil Well Sites Toxic vapors have killed three Colorado oil and gas workers, nine in the US |