Background Checks Illinois

im in southwest Illinois and is doing a background check. They ask what can my former employer. i resigned my position causes They wanted to finish me for attendance (i had a bad staph infection and missed some days which i HAD sick days to cover). the interviewer asked me if it was true about [...]

If a bussiness does a background check, how many years do they go back? I was convicted 8 Years Ago. That will show up in an Illinois backgound check?