The jury in the Graham Dwyer trial has been told they must be satisfied, beyond reasonable doubt, that the architect murdered Elaine O'Hara, by stabbing her to death.
42-year-old Graham Dywer of Kerrymount Close, Foxrock denies killing the childcare worker at Killakee in August 2012.
Mr Justice Tony Hunt has stressed that the jury must set aside any feelings they may have towards Graham Dwyer and adopt a clinical approach to their deliberations.
He has told them proof of unusual fantasies does not constitute a crime unless the ingredients of murder are established.
He says a jury can convict on circumstantial evidence, but they must be satisfied beyond reasonable doubt that Graham Dwyer stabbed Elaine O'Hara to death for sexual gratification.
Mr Justice Hunt suggested that if the jury do not conclude Graham Dwyer was the person who bought and used the so-called secret phones to text the childcare worker then they should go no further in the case.
He is expected to finish his charge tomorrow.
Originally posted at 11.56am
