>> pelley: this is our western edition. the government says a man who took an oath to do no harm instead turned more than 500 of his patients into victims in a shocking case of medical fraud. today in detroit, the doctor listened as some of these patients and their families told in court how he ruined their lives with unnecessary cancer treatments. here's dean reynolds. >> reporter: courtroom sketches could not adequately capture the anguish of the victims today as one by one they confronted the cancer doctor who prescribed aggressive chemotherapy for patients he knew were not ill and for those who were, ordering treatments that were excessive while billing medicare $34 million. in court, dr. farid fata showed no emotion for a man who prosecutors said would bully and browbeat patients who dared to question his treatment. fata has already pleaded guilty to fraud and other charges. a memo from prosecutors