Earlier quoted context omitted.
The article does not make such claims.
Depends on interpretation of > an unauthorised, non-employee individual was allegedly living within a secure part of the O'Hare airport terminal Overall not many details in article, mostly signals one shouldn't be making "lol tos" remarks without knowing more
No, it doesn't depend on intepretation. There is absolutely no way you could interpret that sentence as meaning "he used a stolen badge to get into areas not open to the public". He may or may not have accessed additional areas, but the article certainly does not claim he did. We know he accessed the "secure" arrivals area, and the article strongly hints that that's where he lived. Whether he also accessed other areas is possible, but it's not claimed in the article.