Geen was known at Horton General Hospital as a nurse who always looked for action. Colleagues noted that whenever patients … See more

An internal investigation (before the two deaths had occurred) initially identified 25 patients who had experienced sudden respiratory arrest or failure under Geen's care, but nine were … See more

During his trial, Oxford Crown Court was told that Geen purposely used insulin, sedatives, and muscle relaxants to trigger respiratory arrest or … See more

Fate of victims
A patient who fell into a coma for six days after being treated by Geen, John Thorburn, later died … See more

Between December 2003 and February 2004, 18 patients treated in the hospital's accident and emergency department suffered See more

Geen was arrested as he arrived at the hospital to work on 9 February 2004. He had on his person a syringe with the potentially lethal muscle relaxant vecuronium inside, despite it being strictly forbidden for nurses to take syringes or such drugs out of … See more

Geen's case has been the subject of multiple television programmes:
• A series 1 episode of the series Nurses Who Kill aired in 2016 which focused on Geen's crimes. See more