Honestly your employees may not be ex-cons but that doesn't mean they never did anything that if caught would consider them to be an ex-con. People get away with shit all the time. You never know you might have a murderer, a major thief, who knows working for you. Not having a record doesn't mean they aren't a bad person
Which is why you check references.
For some jobs, it doesn't matter. If I own an iron and crane company, I'm more concerned with their real skills than a criminal record.
Some businesses are set up to hire felons. I used to spend part of my time in my cabin in the Smokey Mountains. Nearby was a Waffle House we really liked. The employees themselves would scare off any would-be hold-ups. They were some women who had lived tough lives. One had "Love and Hate" tattooed on her fingers, the cook had tattoos on his neck. ALL were friendly and gave impeccable service. My first "real" job at 16 was as a bagboy and we worked below minimum wage because we made tips. I've always been a very generous tipper. I'm sure the franchise owner had rigid control systems in place but it seemed to work for them.
If I was a bank manager. Well, basically I couldn't hire a felon because they would need to pass background checks and be bonded.
Bottom line, it's the decision of management.