Blood Link on AllMovie

Craig has a psychic link to Keith, and travels from his home in the United States to Hamburg, Germany, after telepathically sensing details of his brother's gruesome crimes. After bludgeoning an aging boxer (Cameron Mitchell) to death, Keith -- who can also sense his brother -- traps Craig by telling the dead fighter's daughter, Christine (Sarah Langenfeld), where he is. Naturally, Craig and Christine begin an affair, only to have Keith drug Craig and murder Christine after his impotence prevents him from raping her. Craig ends up in jail for the murder and Keith continues his bloody killing spree until Craig's girlfriend (Penelope Milford) shows up from America. And that's when the film starts getting extremely nasty.