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

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 … See more

Fate of victims
A patient who fell into a coma for six days after being treated by Geen, John Thorburn, later died in 2009. His son Richard would state to The Times in December 2014 that his father had never fully recovered from … See more

Between December 2003 and February 2004, 18 patients treated in the hospital's accident and emergency department suffered respiratory arrests or depressions while Geen, a trainee nurse, was alone with each patient. These patients had all been admitted with … 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

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