Well, when you can take a reasonable or not even a reasonable suspicion and prosecute or accuse a person and treat them as if they're guilty, without due process.... Inmates have the right to have due process. There are Supreme Court cases that have affirmed that. Cardinal v. Kent Institution in 1985 affirmed the fact that if the privileges of inmates that are given through the power of the policy of Corrections are going to be removed, they have to follow due process. There has to be a chance for the inmate to speak. To remove his right to have visitors is one of those.
On November 2nd, 2017. See this statement in context.