Netflix, shortly after releasing "the Good Nurse", featuring Eddie Redmayne and Jessica Chastain, put forth a documentary about the same events. The documentary follows Charles Cullen, an ICU nurse, who jumps hospitals every time he gets into trouble and finds most of his work in intensive care units, which handle patients with severe or life-threatening illnesses or injuries.
Cullen is mostly described by his coworkers as smart but corky, and a bit weird however overall a good nurse. He has a certain panacea for pharmaceuticals particularly remembering the name use of the medicines even for the rare ones.
After graduating with a nursing degree in 1986, Cullen started working for St Barnabas Medical Center in Livingston. He went on a killing spree from 1986 until his arrest in December 2003. He repeatedly claimed that he wanted to end patients' lives to end their suffering, nonetheless, he killed patients who were getting better and sometimes as young as 21 years old.
Over the years he confessed to killing 40 people. Although when considering the time frame of roughly about 16 years of nursing and the relative ease of killing his patients, he is assumed to kill more than 400 people.