The death of a Linn County woman a few months ago was caused by severalfactors and charges may yet be filed. An autopsy shows 20-year-old HollyMiller died of exposure. Her boyfriend found the body March 26th outside thehome they shared. The Linn County Medical Examiner says a combination ofmethamphetamine use, asthma and a brain and spinal cord disorder contributedto the death. Foul play has not been ruled out and criminal charges may yetbe filed.