What had he done that she knew about? It's killing me.
I KNOW! When I first got the letters I poured over them. I did figure out several family facts that I didn’t know based on them, but so much of it will always be a mystery. Based on other information (like he once hit a man on the street because he mistook him for someone else (a newspaper article from before these letters, when he lived in Farmington), and, SPOILER ALERT he gets shot and killed in a “lid lifting orgy.”) I’m guessing he is involved with some unsavory characters.