Pychiatric expert agrees Tanya Doyle's behaviour 'certainly odd' in day's before husband's stabbing death

A psychiatric expert has agreed under cross examination that murder accused Tanya Doyle's behaviour was "certainly odd" in the days before stabbing her husband more than 60 times.

The 40-year-old admits killing engineer Paul Byrne at their home in Pairc Gleann Trasna, Aylesbury in Tallaght, Dublin on September 4, 2009, but denies his murder.

The jury heard Ms Doyle visited three hospitals in Belfast and Dublin in the days before killing Mr Byrne.

She had complained Mr Byrne was conspiring with two men from her past when she ran an escort agency and that lenses with communicative powers had been inserted into her eyes.

Prof Harry Kennedy from the Central Mental Hospital has agreed under cross examination by the defence that her behaviour was "certainly odd" in the days leading up to the stabbing.

However, unlike an expert defence witness who believes the 40-year-old has schizo-affective disorder, Prof Kennedy said he believed it was difficult to be sure whether Tanya Doyle has ever had a mental illness.

He said this was partly because the accused had created confusion in relation to her mental health, particularly since taking her husband's life.