My spouse has been physically abused, attacked, coerced, blackmailed, threatened for months by a friend who threatened to destroy his reputation. help

i have seen cut marks on his arms, The guy has admitted in writing and verbally that he has done the abuse and blackmail. . My spouse is on SS disability for mental illness. The guy has hims convinced he can harm him more if Jerry does not do as he wishes. This person has stolen some of Jerry's medication that is crucial to maintaining his stability. He drinks excessively and gets Jerry to do the same. Jerry is so afraid he will do anything the guy demands not just the drinking, but also giving him money, sexual degradation and more.He tries to placate the person for fear of repercussion or further problems. With many months of this, what can he do to protect himself?