My friend runs a business and I am going to tell her that she employs a convicted felon.
Is it really a big deal? Should you really bring that up to your friend?
I think it's a big deal if he was arrested for robbery.
I'm sure it came up during a background check. It's weird that you would bring this up with your friend when it's none of your business.
I want to tell people so they become suspicious of him.
Your friend doesn't need to know about this from you, as he most likely already did a background check. He is just going to think that you are weird for trying to interfere in his work.