He was only 28 years old, so was it drugs or natural causes?
TMZ says, itís now appearing that the level of toxicity (from medication) in Ledgerís system was low enough that it may not have caused his death. These sources say Heathís heart stopped. It could have been a heart attack but itís not certain, at least not yet. Although itís bizarre that a 28-year-old could die of natural causes, it happens.
There is no offical word on how he died yet. The autopsy is still to be performed! I guess we just have to wait and find out once the autopsy is done.