Mary Anna Colwell, a 92-year-old Caucasian woman, passed away on December 28, 2021, in Lower Burrell, Pennsylvania. Initially, her death was believed to be from natural causes, but later investigations revealed a shocking truth. Colwell had been a resident at Belair Healthcare and Rehabilitation Center, where she was allegedly injected with a lethal dose of insulin by a former nurse, Heather Pressdee. Authorities uncovered that Pressdee had a disturbing history of abusive conduct and had been fi
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