She was not assinged to he infirmary 

As a member of the Class of 1999, I was there first hand and she was not assigned to infirmary for housing.  She was assigned her own room in 3rd Batallion, India Company.  There was a CCTV camera set up monitoring the door. 

Military indoctrination started at 8am on a Monday morning.   Shannon Faulkner quit at lunch time the same day.   She spent the rest of the week in the infirmary not particpating in any military activities.  She left for good that Friday.