Serial hospital killer says he wanted to test doctors

A Czech serial killer who has confessed to murdering seven patients in a Czech hospital says he wanted to test doctors' skills. The thirty year old male nurse, who injected 17 patients with excessive doses of a blood-thinning drug over a period of six months has told the police he wanted to see if doctors were able to detect the problem. The head physician in the hospital where the killings occurred called an investigation when it recorded a higher than usual death-rate as a result of unexplained internal hemorrhaging. The hospital's director Josef Pejchl was dismissed on Tuesday.