The question was if consent is given to search justa part of the car, such as the glovebox as in this case, are you in fact giving consent to search the entire vehicle?
As I see it, in this case, the person thought that should reason be fabricated and seacrch conducted, an Exacto knife could be considered a weapon or a concealed weapon and go to jail and face charges. Rather than lie, it was told that the knife was in the glovebox and rather than just getting the knife, the cops took it that this warranted a search and destroy mission.
Back to question: by saying something of possible interest is located in part of the car, it is taken a full search is granted?? And, back to question, what are your qualifications to answer the question-- lawyer, paralegal, legal researcher, random person from the street.....?????