A Scientologist was convicted of quackery
A short summary of the case: a Scientologist convinced a patient, who was diagnosed with breast cancer, to refuse the operation suggested by her doctor and to try to address and handle her condition by accepting auditing. The auditing process and the various bizarre treatments attempted by the Scientologist were unsuccessful and the patient finally perished after a long period of unnecessary suffering and excruciating pain.
The whole case is explained in detail in the judgement of the Supreme Court of Hungary here (in Hungarian, English translation will be available soon):