Jean Eric Gassy is a deregistered medical practitioner who was convicted in October 2004 of the murder on 14 October 2002 of Dr. Margaret Tobin, then the head of government mental health services in South Australia. Dr Tobin was shot four times as she and her colleagues were walking away from the lift that she had taken to the eighth floor of the office (in Hindmarsh Square) in which she worked. He is now incarcerated in Yatala Prison. Gassy's retrial on the same charge took place in April 2009 and he was convicted on 6 May 2009.