Need some advice

Recently an article came up to my attention regarding my previous employer, and I honestly want some advice.
Should I take off this employer from my resume? I had a great deal of experience in the nine months that I worked there, most of my teaching and reference work was there.
Only once did I feel uncomfortable and I quickly got out of that scenario. I guess you could say it is a positive thing that I moved back to California and I am no longer the librarian there.
I have never used them as a reference, mostly because I didn't think the owner liked me very much. I have a sinking feeling the only reason they hired me is because I was the only one who even applied for the position....
So what do you think? Keep it or drop it?