The jury in the Ana Kriegel trial has been sent home for the day having deliberated for just under half an hour.

They have been asked to consider whether two teenage boys murdered the 14-year-old schoolgirl in a derelict house in Dublin on May 14th last year.

They must also decide if one of the boys committed an aggravated sexual assault, as alleged by the prosecution.

The boys, who were both 13 years of age at the time of Ana's death, deny the charges.

After directing the jurors on the law, Mr Justice Paul McDermott finished summing up the evidence heard over the six-week trial this afternoon.

It is the prosecution’s case that Boy A violently sexually assaulted and murdered Ana Kriegel on May 14th last year after Boy B allegedly lured her from her home in Leixlip to the derelict farmhouse in Lucan where her body was found three days later.

In relation to Boy B, he told them that if they accept as credible his claim that he didn't know he was bringing Ana to the house for another purpose, then they must acquit.

If they reject what he says, he told them they must stand back and look at all the other evidence in the case and ask themselves if he is guilty of participation as alleged by the prosecution.

He said the circumstances are “obviously upsetting and disquieting” but he told them they must examine the large amount of evidence “clinically.”

Reporting from Frank Greaney at the Central Criminal Court