Tina Cahill admits fatally stabbing fiancé in Sydney 'while suffering PTSD'

A newly-engaged Irish woman was suffering from post-traumatic stress disorder (PTSD) when she fatally stabbed her fiancé in Sydney, a judge has been told.

Tina (Cathrina) Cahill, 27, from Wexford, was due to face a murder trial in the New South Wales Supreme Court today.