GP denies murdering his wife with insulin

A Sydney GP murdered his wife by injecting her in the buttock with a lethal dose of fast-acting insulin so he could be with his lover, a judge has been told.

Dr Brian Kenneth Crickitt, 63, has pleaded not guilty in the NSW Supreme Court to murdering Christine Crickitt, 58, inside their Woodbine home in Sydney's south-west, late on New Year's Eve or early on New Year's Day in 2010.

In the Crown's opening address on Wednesday, prosecutor Mark Tedeschi, Queen's Counsel, said Dr Crickitt was motivated to murder his wife so he could claim her life insurance and have a future with his lover.

Ms Crickett did not have diabetes, but shortly before her death on 30 December, her husband carried out Google searches on insulin overdoses, Mr Tedeschi said.

On 31 December at his Campbelltown medical practice, he saw a patient with diabetes and later allegedly used a prescription he had