A Natrona Heights woman and former nurse pleaded guilty Thursday to harming and killing patients she was supposed to care for. It comes nearly a year after Heather Pressdee, 41, was first arrested and charged with harming and killing patients. As the Pennsylvania Office of Attorney General continued to investigate, it found more victims going back to late 2020. Pressdee, who pleaded guilty to first-degree murder, received life in prison with no possibility for parole. Investigators said Pressdee admitted to unnecessarily injecting her patients with insulin, killing them or attempting to kill them and even injecting some patients on more than one occasion if they did not die. The incidents happened at nursing home facilities in Allegheny, Armstrong, Butler and Westmoreland counties. Her alleged victims range in age from 43 to 104 years old.