Jurors have been asked to keep the age of the participants in mind during the trial.
Ana Kriégel was lured to her death by two 14-year-old boys, one of whom violently sexually assaulted her before killing her, it is alleged.
One of the 14-year old boys accused of murdering Ms Kriégel last year had a backpack containing gloves, kneepads, shin guards and a homemade “zombie-type mask,” the Central Criminal Court heard on Tuesday.
Boy A has pleaded not guilty to the murder and sexual assault “involving serious violence” of Ms Kriégel on May 14th, 2018 at Glenwood House, Laraghcon, Clonee Road, Lucan in Dublin.
Boy B has pleaded not guilty to the murder of Ms Kriégel on the same date.
The trial at the Central Criminal Court is expected to last up to six weeks.
