Libby Busbee is pretty sure that her son William never sat through or read Shakespeare's Macbeth, even though he behaved as though he had. Soon after he got back from his final tour of Afghanistan, he began rubbing his hands over and over and constantly rinsing them under the tap.
"Mom, it won't wash off," he said. "What are you talking about?" she replied."The blood. It won't come off."
On 20 March last year, the soldier's striving for self-cleanliness came to a sudden end. That night he locked himself in his car and, with his mother and two sisters screaming just a few feet away and with Swat officers encircling the vehicle, he shot himself in the head.