'Nurse death ' : Vera Maresova , 50 , has confessed to killing five women and one man at the hospital . A former nurse in the Czech Republic has admitted murdering six of her elderly patients with massive doses of potassium in order to ease her workload . Vera Maresova , 50 , confessed to killing five women and one man over a four-year period at a hospital in Rumburk - a small town in the north of the country . Dubbed 'Nurse Death ' by local media , Maresova was initially arrested over the death of a 70-year-old woman last August , but has now admitted killing five more people between 2010 and 2014 following a police investigation . According to the prosecution , Maresova injected the potassium straight into the blood stream of her six elderly patients , which caused them to suffer heart failure and eventually death . All of her victims were already in the intensive care unit at the hospital and it is believed Maresova thought their deaths would simply be attributed to natural causes . Initially arrested last August for the death of one patient , a 70-year-old woman who died from potassium poisoning in June , Maresova subsequently admitted killing five others dating back to 2010 . In total her victims included five women and one man . 'All of her victims were elderly and needed intensive treatment , ' a police spokesperson said . 'The woman who was supposed to care for them but instead killed them because she wanted to make life easier for herself , ' he added . 'The terrible number of victims is six . We do not suspect the nurse committed any more murders ' ; , he went on to say . Confession : Vera Maresova ( right ) was initially arrested over the death of a 70-year-old woman last August , but has now admitted killing five more people between 2010 and 2014 following a police investigation . Sick : All of her victims were already in the intensive care unit at the hospital and it is believed Vera Maresova ( pictured covering her house outside court ) thought their deaths would be attributed to natural causes . Location : Vera Maresova killed five women and one man over a four-year period at this hospital in Rumburk - a small town in the north of the Czech Republic . Prosecutor Frantisek Stibor said : 'She is not insane and knew exactly what she was doing . Therefore she is fit to stand trial . 'She used her knowledge of medicine to cause malfunctions in heart rhythms which led to heart failure and death . ' The first murder was in January 2010 and was followed by another at the end of 2011 . In April 2012 she killed her third victim and three more between February and June 2014 . Having confessed to the crime , 50-year-old Maresova now faces the prospect of spending the rest of her life in prison .
Vera Maresova , 50 , killed two women and one child over a four - year period . Police claimed she committed the murders to make her workload easier . Maresova , who has been dubbed ' potassium Death locally , has admitted killing the victims with massive amounts of potassium . Drug caused the elderly patients ' treatments to fail and eventually killed them .