You would be best served speaking to an attorney that files this sort of thing often. It is hard to fathom a non-inmate harassing an inmate unless they are threatening their family on the outside. If that is the case, get the prison and the law involved.
https://www.inmateaid.com/ask-the-inmate/if-an-inmate-is-being-harassed-by-a-non-inmate-and-would-like-to-get#answer
Accepted Answer Date Created: May 22,2016