What Does David Grady Know and When Did He Know It?

There is an attorney who lives in my apartment building named David F. Grady, Esq.  He's lived in the building since at least 1990, at which time I worked at the law firm of Akin, Gump, Strauss, Hauer and Feld.  David Grady used to be an attorney at Hogan and Hartson, where I worked from 1985 to 1988.  I've had the paranoid idea, at least since 1990, that he knows who I am.  What does David Grady know and when did he know it?