 During his trial, the Oxford Crown Court was told that Geen purposely used insulin, sedatives, and muscle relaxants to trigger respiratory arrest or failure in patients because he enjoyed the 'thrill' of resuscitating them.On 18 April 2006, a jury found Geen guilty of the two murder charges and of intentionally inflicting grievous bodily harm on 15 patients.On 9 May 2006 Geen, then 25 years old, was given 17 life sentences with the recommendation that he spend at least 30 years in prison before being considered for parole.