False accusation of theft

Hi,

My business partner has on numerous occasions falsely accused me of theft of company property. These accusations were made by email and in a legal notice from his lawyers, and I have proof of all communication as well as my innocence. As well as that all of his accusations are without any proof whatsoever.

There is already an ongoing criminal case between myself and him as he physically attacked me a few weeks ago.

I want to know what I can do to stop him from constantly sending me emails accusing me of theft and threatening me. Can I take out a case against him for false accusations?

Thanks