Serial killer Bobbie Sue Dudley left a trail of death at a Florida nursing home before stabbing herself and checking into a state mental hospital.

After having his medical license suspended, Dr. Randeep Mann concocted a deadly plan to blow up Arkansas Medical Board chairman Dr. Trent Pierce. 

Colleagues of Brian Rosenfeld told investigators that he would bend patients’ fingers back until they screamed in pain and even “over-administer laxatives” to them.

Throughout his career, medical technician David Kwiatkowski exposed at least 6,000 patients to hepatitis C, and at least 45 of them were determined to have been infected, causing the largest outbreak in the U.S. 

Cathy Wood said she and her lover Gwendolyn Graham, who both worked as nurse’s aides at Alpine Manor, murdered five patients so they would have “something that would bind [them] together forever.”

Brian O’Connell had been treating cancer with photoluminescence and black salve, a topical paste that contains alkaloids, which attack and destroy living tissue.

Pharmacist Robert Courtney pocketed $19 million from diluting medications before delivering them to doctors’ offices.

Investigators learned that Hsiu-Ying “Lisa” Tseng made more than $3,000 a day at her clinic that had become a cash cow for opioid prescriptions. 

Dr. Peter Normann advertised quick and easy “lunchtime lipo” procedures at his Phoenix clinic, but the surgeries resulted in three patient deaths.

Oliver O’Quinn later admitted that he murdered 24-year-old college student Michelle Herndon because “she put him down.”