I did some work for an attorney once. It was for a murder case, they were the defense. They had a copy of the victims HD and they needed me to go though it searching for anything fishy, threats, names, ect. It was pretty fun; I have to admit, playing the investigator. Basically the first thing I did was to grep the entire copy for key words. Then I collected all of the file extensions so I could determine what programs they used. For the programs that allowed it, like word, I wrote some scripts that did the key word search again. Once I had all of my hits, I had to go back and print out the excerpts and locations for the attorney to review.