Old age, infiltrators, torture, and battles should all be potentially deadly.
To my knowledge, you cannot be wounded through torture. While it may be something to do down the road, I think the cases where you already get injured are a good starting point. That way, another check can be placed into the existing wound code.
I will say, however, that I feel like a Hero should always remain a Hero. It's not a profession, it's a lifestyle. They can still be martyrs; other deaths wouldn't likely be announced to the entire continent like a Hero. On top of that, not always is a death used as a rallying call.