criminal record.
in the US you can discriminate against employees who have any sort of criminal record. I've served jailtime for possession of cannabis, so that automatically rules me out for a lot of white-collar jobs. Black people tend to get the brunt of policing, and hold disproportionately high rates of misdemeanor and felony charges and longer sentences. I got 3 years for my conviction, but i know a black machinist who served 8 and a parole for an almost identical charge.
We call them "correctional facilities" but continue to discriminate in housing and employment for anyone who's been 'corrected' in one...sort of a standing biblical retribution.