Natural causes just means not murder, suicide, or accident, right?
Well, upon Googling the term, "natural causes" seems to have a pretty loose definition, so... there's that.
Though generally drug overdoses and toxic exposures are usually singled out from natural causes, even though they would appear the same (organ failure/stroke/heart attack)
Sure, he might have had a rare genetic condition that is rare in the US and rarer amongst black Americans.
For a drug overdose or a toxic exposure, either someone else did it to you on purpose (murder), you did it to yourself on purpose (suicide), or it was unintentional (accident). How do you get a drug overdose by natural causes (not murder, suicide, or accident)?
I used brugada syndrome as an example because I know someone who has it, it was discovered late in their life, and could have killed them had it gone undiscovered. There are probably hundreds or thousands of possibilities, some more racially likely than others. How do you feel about the racial probabilities of the "or something" portion of my speculation? Is 'or something' also especially rare particularly among black Americans?