This was "regarded by members as a serious slight to lineage authorities and was construed as the Regent's attempt to secure his position of control." Also controversial was the fact that Tendzin "took further action to buttress his centrality by denying students permission to seek teachings from other Kagyu Tibetan teachers, claiming that only he possessed the special transmission, materials and knowledge unique to the Trungpa lineage. Students were told that if they wanted to practice within the community, they would have to take spiritual instruction from the Regent." Other behavior was troubling as well. As one scholar who has studied the community noted, Tendzin was "bisexual and known to be very promiscuous" and "enjoyed seducing straight men" but the community "did not find [this behavior] particularly troublesome." Not all his partners were unwilling; one scholar noted "it became a mark of prestige for a man, gay or straight, to have sex with the Regent, just as it had been for a woman to have sex with [Trungpa] Rinpoche", but at least one student reported that Tendzin had raped him. As a former Vajradhatu member attested, "a chilling story had recently been reported by one of . . . [the] teachers at the Buddhist private school [for the Vajradhatu community]. This straight, married male was pinned face-down across Rich's desk by the guards [the Dorje Kasung] while Rich forcibly raped him." It was revealed in 1989 that Tendzin had contracted HIV and for nearly three years knew it, yet continued to have unsafe sex with his students without informing them. He transmitted it to a student who later died of AIDS. Others close to Tendzin, including Vajradhatu's board of directors, knew for two years that Tendzin was HIV-positive and sexually active but kept silent. As one student reported at the time,  Stephen Butterfield, a former student, recounted in a memoir:  Butterfield noted,  According to Diana Mukpo, Trungpa's wife and widow, he ultimately became disillusioned with Tendzin as his heir, and during his final illness he called Tendzin "terrible" and "dreadful" and indicated that he would have gotten rid of him had he had a suitable candidate to replace him with. Rick Fields, the editor of Vajradhatu's publication the "Vajradhatu Sun", wrote that he resigned from his editorial position after Tendzin and the board of directors stopped him from publishing news of the events.