The Strange Death of Richard the Lionheart

From English Historical Fiction Authors:

What most historians agree on is that Richard was walking the chateau's perimeter without wearing his chain mail and he was shot by a castle defender using a crossbow. The wound in his left shoulder turned gangrenous. It steadily grew worse over the next 10 days. Some wrote that while dying Richard asked that the bowman be brought to him. He then forgave the man, who was named Peter Basil, and instructed that he should not be harmed. Richard died in the arms of his mother on April 6th. Later, defying Richard's orders, Peter Basil was flayed alive and hanged.

Why did Richard I, a seasoned and expert warrior, expose himself to a bowman's shot? Did the king and crusader put his life at risk to claim some grubby treasure dug up from the ground--why?(Read more.)