Vickie Dawn Jackson
Noted town wallflower Vickie Jackson may have killed as many as 20 people between December 2000 and February 2001 – and attempted five more – but her name never earned the household recognition outside her small town. The North Texas hospital where Jackson worked as a nurse was plagued by a rash of respiratory deaths, but because the patients were all elderly, the deaths were not considered suspicious – until administrators realized several vials of mivacurium chloride, a powerful drug used to temporarily paralyze a patient's ability to breathe, had gone missing. Investigators eventually focused on Jackson after the hospital administration realized that she'd been the last one in the dead patients' rooms – and that she'd begun saying she'd "take care" of unruly hospital guests. Just over two months after her killing spree began, a syringe with traces of the drug was found in her garbage – but it took over a year, until July 2002, for Jackson to be arrested. In 2006, she pleaded no contest to charges that she took the lives of 10 people, but never admitted her guilt. She is now serving a life sentence, and as of last year was seeking a new trial.