Basically just cross-check between Mario's pile of resumes ( left side ) and what is written in the Investigator's Report ( right side ). Read both of them carefully, especially when it comes to Occupation section.
For example, there is this one resume of a Japanese MILF saying that she is a herbalist. But if you read the Investigator Report about her, turns out she is an assassin ( ninja ) and being a herbalist is her cover-up.
As for the other sections, like Names, Age, Address and Income, just read carefully and you'll easily find which one is wrong.
P.S. Not all resumes has something wrong with them, so make sure to clear the red highlight first before you start checking.
