If you are in the St. Louis area, you would be welcome to visit the archives. You can read more about potential genealogy sources in the WUSTL History Resources Guide.
If you are not in the area, we can do some limited checking for you. We would need to know as much of the following information as possible:
Full name
Birth date
Probable dates of attendance
Probable area of study (medicine, law, painting, math, etc.)