60-year-old Brendan Mullin of Stillorgan Road, Donnybrook, Dublin 4, appeared before Dublin Circuit Criminal Court on Tuesday where he pleaded not guilty to the 15 charges against him.

Michael Murray (54) has 40 previous convictions for rape, sexual assault, harassment, abduction of a child, false imprisonment, threats to kill, burglary and theft

Shane Corrigan (53) pleaded guilty to using information technology to facilitate the sexual exploitation of a child

CCTV footage played in court showed the four men entering the school before confronting a teenage student, who took a hammer out of his bag in self-defence and then fled

Dainius Sakevicius (54) pleaded guilty to one count of assault causing harm to his then partner