I'm stuck on the first file where you had to move the body and examine the bookcase to find out the contradiction. I CAN'T FIND WHAT'S WRONG :-\ Any help would be greatly apprieciated.
Check on the right side white books, you'll read the name Gumshoe there, present as evidence the white file with a letter on it.
The gunhole contradicts of where the victim was shot. or Something like that. It shows that someone rearranged the files. I don't remember what you have to present though. The bloodstains shows he supported himself and then he fell to his death so the bullet hole and where the file is doesn't compute. If you are at the part where the body is sitting up than present the missing book in-between the letters Gumshoe. Something like that, I forgot, sorry Dx