Complex sentence: It was initially speculated that this condition may have played a part in his death; however, the New Jersey medical examiner's office reported "multiple drug toxicity" in the form of cocaine and heroin as the official cause of death.
Split into simpler sentences: It was initially speculated that this condition may have played a part in his death. The New Jersey medical examiner's office reported "multiple drug toxicity" in the form of cocaine and heroin as the official cause of death.