How to statistically prove or disprove pattern of employment discrimination?
It seems you would have to first prove, statistically speaking, that qualified minorities were not considered for officer positions. If the position required a business degree or some other such speciality and only 1 out of 20 minority applicants for the job had a business degree, that complicates the figures somewhat. Of course it could be argued that the employer was writing the job requirements in order to exclude certain minorities, too.