Filing a case for defamation by the ex-employer

My ex-employer put a criminal case on me and I was in custody for 3 days, and finally, the prosecutor closed my case saying there's lack of evidence.

Now, this employer is taking my case as a reference to spoil my reputation in the market. She is going to all clients telling them I am a criminal and not to talk to me and work with me.

She did this when my case was open and even now she continued to do same. I am very disturbed and no one is ready to give me a job because of this.

I have proof that she sent emails stating I am a criminal. I want to file a case against her, can I do this as per the UAE law?