Kristen Heather Gilbert (born Kristen Heather Strickland, November 13, 1967[1]) is a former nurse and an American serial killer who was convicted of four murders and two attempted murders of patients admitted to the Veterans Affairs Medical Center (VAMC) in Northampton, Massachusetts.[2] She induced cardiac arrest in patients by injecting their intravenous therapy bags with massive doses of epinephrine, an untraceable heart stimulant. She would then respond to the coded emergency, often resuscitating the patients herself.