The cause of death for ex-NBA player Darius Morris has just been revealed ... heart disease is the killer, with drug and alcohol use playing a big role.
Darius' official cause of death is coronary artery disease ... according to the Los Angeles County Medical Examiner.
According to the ME's death investigation summary, obtained by TMZ Sports, drug and alcohol use was a significant factor in Darius' death ... specifically, the effects of cocaine, hydrocodone and ethanol.