ISPCC chief executive John Church called on social media platforms to do more to protect children from harmful content

Research focused on patterns of adversity which young people experienced across home, peer and school contexts

Martin Hayes' defence team, pointed out a postmortem examination found that the single stab wound to Ms McDermott's abdomen could be "consistent with self-harm", as is contended by the defence.

The study is believed to be the first national systematic examination of the incidence and patterns of self-harm among prisoners in the State

The study found people as young as four are self-harming

Suicide remains the leading cause of death among young males (under 25)