After talking to the man cutting up the bodies, look for the code at the bookshelf. It will be a small piece of paper. The code is "74821536". The safe is a different story, as it uses symbols instead of numbers. Select the symbol that best represents the number. For example, the one that resembles a "plus sign" is a "4"; the sideways 8 is in fact an "8", the "1" resembles a backwards "1"; the "3" resembles a "3", the "7" resembles a "P"; and the "6" looks like a plus sign with an extra line at the bottom.