Kristen Gilbert, a.k.a. The Angel of Death, is a sociopathic, "angel of death"-type serial killer responsible for several murders and attempted murders of patients at the Veteran Affairs Medical Center in Northampton, Massachusetts, from 1988 to 1996. Gilbert is suspected of hundreds of murders at the facility, which has never been conclusively proven. Gilbert targeted the patients at the Veterans Affair Medical Center. She typically killed or attempted to kill them with fatal and critical doses of epinephrine in their IV lines. Gilbert would at most abandon the patient for some time for the poisoning to take effect, having herself or her colleagues respond either when the patient was coding or something else.