Examine the scepter to obtain the Red Jewel. This goes into the Bejeweled Box, which you can get in the Interrogation Room. Accessing this area requires the Club Key, so if you don't have that yet, keep progressing the story until you get it. Once you've got the Bejeweled Box, combine it with the Red Jewel to get the S.T.A.R.S. badge. You can use this item in two locations: the Underground Stairs in the Middle section of the Underground Facility, and the S.T.A.R.S. Office.
The storage lockers were a “pilot,” the kind of small test that city government frequently uses to test a new or controversial idea. The city offered up the lockers for individuals to use for months-long stretches. At the time, city officials warned that “misuse of the lockers, vandalism, or other unanticipated results,” could force them to cancel the project.