Yes. A pathologist can know if there was a catasthropic event like the natural rupture of an artery (e.g. stroke, heart attack) In vivo events evolve differently than post mortem ones, e.g. strangling a dead body shows differently than strangling a person to death.
More recently, he might have been wearing a vital signal monitor that kept logs.
Someone so famous and regularly doing spectacular things surely have a bunch of sensors attached to them that reports a bunch of metrics about their physiological state.
