Not having access to this exclusive report, and with no links provided, no further comments could be made. Daniel Naroditsky was a fixture at the Charlotte Chess Center, participating in PR events as well as Rapid and Blitz tournaments. (Photo: Kelly Centrelli/Charlotte Chess Center)Indeed, the actual toxicology report, as described then, actually went a good deal further, and stated his cause of death in the view of the professional opinion of the medical examiner. The concentrations of methamphetamine and mitragynine in the decedent’s blood on postmortem toxicology are not considered fatal on their own. Based on the circumstances, history, and postmortem findings, it is my opinion (the medical examiner's) that the cause of death in this case is Probable cardiac arrhythmia due to Probable cardiac involvement of systemic sarcoidosis; methamphetamine and kratom (mitragynine) use are contributory.