MTV News has additional details on the natural causes of Dave Williams’ death. The coroner’s toxicology report revealed the 30-year-old singer died from cardiomyopathy, a disease of the heart muscle. Williams’ condition, concentric left ventricular hypertrophy, prevents blood flow from the left ventricle to the right. Williams was never diagnosed with the disease, the cause of which is unknown. The report also states nasal swabs showed no traces of cocaine and the drug was not found in his system.