Traitors are not tolerated in the kingdom of Dr. Arnold Klein. The 67-year-old Father of Botox, who once led a Beverly Hills beauty revolution and became nearly as famous as the stars he treated, is now waging war against his enemies. The list is long. First, there are the powers in the music business who arranged the final concert tour of his most famous patient, the late Michael Jackson. He charges them with conspiring to control the singer’s estate and with using Klein as a scapegoat by alleging that he had gotten Jackson addicted to the narcotic Demerol. Then there are the rats who he says masqueraded as patients in order to issue him a subpoena, forcing him to appear before the Medical Board of California for purported irregularities. Worst of all are his former office manager and former accountant. He alleges that they have attempted to ruin him by releasing Jackson’s medical records in the involuntary-manslaughter trial of the singer’s personal doctor, Conrad Murray, who was convicted last November and sentenced to four years in prison. He also alleges that they embezzled tens of millions of dollars from him and tried to kill him. Because of them, Klein claims, he was forced to declare bankruptcy in January 2011, put one of his homes on the market, and auction off his art and memorabilia.

Klein is also striking back at the Food and Drug Administration (F.D.A.), which he says is a “drug cartel” controlled by the pharmaceutical giants, and at the jackals of the media. To keep his followers and fans up-to-date, he posts intimate details about his predicament on Facebook.

I approached the doctor for an interview, but he informed me through his publicistthat if I intended to interview his former employees I would get no cooperation from him. Then one day in November my phone rang, and Klein, in a deep, gravelly voice, began talking nonstop: “I’ve given my life for other people and have gotten screwed for it Do you know I discovered the first hu...