Sheffield fire that killed 2 deemed accidental Updated Jan 15, 2021; SHEFFIELD — Fire investigators have determined the fire that took the lives of two people Wednesday was caused by a faulty chimney system. Two residents in the home at 1715 Hewins St., James Boltrom, 75, and Dorene Boltrom, 66, died as a result of the fire. Investigators determined a faulty chimney attached to a wood-burning furnace allowed smoke and flames to escape, said Jennifer Mieth, spokesperson for the state Department of Fire Services. Authorities determined there were no working smoke detectors in the log cabin-style home. The investigators’ report indicated they found several places where the chimney failed and allowed fire into the structure, including in the basement, where investigators found significant amounts of kindling and firewood near the furnace.